Which Led ?

[CLOWD11]

Its better than the previous, but.....

If that draws 500W then your missing the point of using LED to reduce power consumption. Price per watt is good on that light, but....

My opinion would stress that that light will not outgrow a 400W HPS so its number one objective has failed badly.

See if you can find any good grow/yield reports on IC, youtube etc invovling that model otherwise its still a gamble if you are relying on the sellers info about performance. If you find posted that they perform alright then go for it, but there is better out there imo.

Youve already saved $110 by asking, well done!

 

[mantizz007]

Ok guy's give me some companies to check out. I thought i read Blackstar was a good company. I guess I'm getting confused about what makes a good led. I love DIY also so If there's a place to buy the stuff to make them I would love to know that also. Thanks for answering my stupid question. There really should be a sub fourm for leds.

 

[LetsSeeYa]

Anyone have any idea'?

Anyone have any idea'?

Welthink is the company. A friend turned me on to them and even got the 2nd bar with custom colors for start to finish growing. But new to growing inside and in a tent, my first grow had a weak yield. But quality was killer as i grew Gordy's Spice #18, great weed.

I am planning on a Scrog or Monster cropping, which iv never tried either of each method. I do have plants re vegging ATM, plus working on getting seeds up and ready. I should have taken clones from last grow, i even have a small cloner. But iv learned from that, cuz i have about 5 days and im out.................this sucks.

I was wondering if anyone might help me get a better yield, who uses LED's. I am pumped with the lights, just new to indoor tent growing. I only have one grow finished in the tent, but used CFL's for last years re veg outdoor grow. Killer inside and out!

Anyone ever use these lights out there. My friend looked at many company's, but found these in China to be the best, just pricey. They are $450.00 for each bar and i have two with red/blue and the mixed spectrum bar he created for me. My first attempt, i didn't even use any fan but the one in the tent, so i didn't have to pull any air into the tent to cool it. Now its not because i didn't want to, i just ran outta cash, but temps were 80 to 87 degrees and my plants grew fine. I just should have given them some veg time and top/fim.

So any advise on getting my yield up, i could use the advise. I am happy with the lights and the info came from the web site so if its all true or not, i really dont care. They did very well with the mistakes i made so when i get the right method down the yield will be killer, iv seen it.




WEX-C150 LED Grow Lighting
110~240V 150W LED Grow Lighting
3W×52 pcs LED
Wavelength: Red 630nm; Blue 460nm
Color: Red or Blue or Red-Blue (ratio can be customized)
Suitable height above plant: 0.5~4m



Features
● LED grow light is newest technology in plant growth;
● It saves 80％ energy compared to HPS or MH light
● Built-in switching mode power, no need outside ballast or driver,
convenient to use
● Easy to install and use, plug into the electric outlet(120/230Vac) directly
● Promote the plants growth,budding, flowering
● About 90％ light of LED can be absorbed by plant, but only 10％ light
of HPS or MH absorbed
● Less heat ,Reduce grow room temperature 10～15℃ compared to HPS
or MH light
● Replace 400W to 600W HPS grow light
● 120 degree wide beam angle
● 3 years warranty



Performance

Item
Value
Item
Value
Voltage
120/240V 50/60 Hz
size
1000×113×113
power
150W
packing
1080×175×175mm
current
0.65~1.25A
N.W
6.3Kg
Color
Red/Blue/Red-blue
Working environment
-20~40℃
Wavelength
Red: 630nm；Blue: 460nm
Storage condition
-40~85℃
Lifetime
50,000 hours
Height above plant
0.5~4m


My friend said 18'' away from canopy, but just seemed to far away so some might have been to close. Not sure. But i need to figure it out before i fill it with a Scrog screen of weed.

Peace an thanks for any help,


LSY

 

[CLOWD11]

Height above plant- 0.5-4m, wtf!
Red: 630nm；Blue: 460nm, Two wavelenghts only!

That seems a very basic LED light with only 2 wavelenghts. Now you have to embark on another mission to fill in the missing spectrum required to make good buds.
You could improve the distance bringing it down to about 12" but check for any signs it may be too close after a few days.
T5s or CFLs will help with the spectrum but add heat.
Has your friend had good yeild with those lights?

 

[LetsSeeYa]

Height above plant- 0.5-4m, wtf!
Red: 630nm；Blue: 460nm, Two wavelenghts only!

Yeah and if i had the space, i could grow many more plants! You didn't read all the post or something, because the red/blue light was made this way. But the other light i have is a lot different with all needed spectrum colors the other bar doesnt have. I could have only got one, but these work toghter to create the perfect lighting. I will get the ratio of the 2nd light so you understand.

This guy did his research and went with what he thought the best. And his grows prove it as he sold his 1000's and is straight LED grower. Like i had said in my post, the grow method was not good or i would still have smoke. But his grows are killer, but isn't in a tent and uses more lights then me in hydro. So he has way more room to grow. He advised me to 18'' above the canopy, but i messed that up for my first run. But not next run, im going to show what these can do in a Sog/Scrog.

That seems a very basic LED light with only 2 wavelenghts. Now you have to embark on another mission to fill in the missing spectrum required to make good buds.
You could improve the distance bringing it down to about 12" but check for any signs it may be too close after a few days.
T5s or CFLs will help with the spectrum but add heat.
Has your friend had good yeild with those lights?

I should have stressed more that i have two grow bar's, which one is red and blue. And the other light fills in the other light spectrum's needed for a perfect set-up. If you missed it, i said they will customize any spectrum a person wants. And the two i have go together like Pea's an Carrots


Thanks man,

LSY

 

[cannarelief]

This forum has some very well informed people regarding LED and has grow light threads

http://www.candlepowerforums.com/vb/forumdisplay.php?91-LED


https://encrypted.google.com/search?q=Grow+LED&sitesearch=www.candlepowerforums.com

 

[GP73LPC]

Welthink is the company. A friend turned me on to them and even got the 2nd bar with custom colors for start to finish growing. But new to growing inside and in a tent, my first grow had a weak yield. But quality was killer as i grew Gordy's Spice #18, great weed.

I am planning on a Scrog or Monster cropping, which iv never tried either of each method. I do have plants re vegging ATM, plus working on getting seeds up and ready. I should have taken clones from last grow, i even have a small cloner. But iv learned from that, cuz i have about 5 days and im out.................this sucks.

I was wondering if anyone might help me get a better yield, who uses LED's. I am pumped with the lights, just new to indoor tent growing. I only have one grow finished in the tent, but used CFL's for last years re veg outdoor grow. Killer inside and out!

Anyone ever use these lights out there. My friend looked at many company's, but found these in China to be the best, just pricey. They are $450.00 for each bar and i have two with red/blue and the mixed spectrum bar he created for me. My first attempt, i didn't even use any fan but the one in the tent, so i didn't have to pull any air into the tent to cool it. Now its not because i didn't want to, i just ran outta cash, but temps were 80 to 87 degrees and my plants grew fine. I just should have given them some veg time and top/fim.

So any advise on getting my yield up, i could use the advise. I am happy with the lights and the info came from the web site so if its all true or not, i really dont care. They did very well with the mistakes i made so when i get the right method down the yield will be killer, iv seen it.




WEX-C150 LED Grow Lighting
110~240V 150W LED Grow Lighting
3W×52 pcs LED
Wavelength: Red 630nm; Blue 460nm
Color: Red or Blue or Red-Blue (ratio can be customized)
Suitable height above plant: 0.5~4m



Features
● LED grow light is newest technology in plant growth;
● It saves 80％ energy compared to HPS or MH light
● Built-in switching mode power, no need outside ballast or driver,
convenient to use
● Easy to install and use, plug into the electric outlet(120/230Vac) directly
● Promote the plants growth,budding, flowering
● About 90％ light of LED can be absorbed by plant, but only 10％ light
of HPS or MH absorbed
● Less heat ,Reduce grow room temperature 10～15℃ compared to HPS
or MH light
● Replace 400W to 600W HPS grow light
● 120 degree wide beam angle
● 3 years warranty



Performance

Item
Value
Item
Value
Voltage
120/240V 50/60 Hz
size
1000×113×113
power
150W
packing
1080×175×175mm
current
0.65~1.25A
N.W
6.3Kg
Color
Red/Blue/Red-blue
Working environment
-20~40℃
Wavelength
Red: 630nm；Blue: 460nm
Storage condition
-40~85℃
Lifetime
50,000 hours
Height above plant
0.5~4m


My friend said 18'' away from canopy, but just seemed to far away so some might have been to close. Not sure. But i need to figure it out before i fill it with a Scrog screen of weed.

Peace an thanks for any help,


LSY

I own the WEX-C150, but it's the version that contains 5 different colors.

50% 660nm deep red
10% 630nm red
10% 600nm orange
10% 3500K warm white
20% 460nm blue

I have not been able to grow our beloved plant, but here are two jalapeno plants kicking some ass under it... i have used this light since these plants were seedlings. they are now starting to produce peppers







The LED light...





I am pretty pleased with mine thus far.

 

[yesum]

That Blackstar 500 draws about half that in watts. The 240 model draws 133 watts. They cannot run 3 watt LED's at full power because of heat. The 240 is rated for 2x2', so the 500 is likely good for 4x4'.

I do not work for them btw, and do not have their unit. I have a HGL, but not everyone can afford them or similar lights.

 

[GP73LPC]

That looks like a crap grow to me.
One of the pics shows his stretchy lanky plants touching the light. Any LED that produces excess stretch is way under powered. My one watter burns holes in leaves at 4". His buds are lucky to be average in size and he even uses CO2. Im not sold on his 9x expensive LED light grow.

I look forward to seeing if you can get your WEX growing well.

lol, ok. it's no crap grow to me. plus he got about 18 inches in light penetration from the WEX as you can see in his drying photos...

he also has a very nice gpw ratio, all while not dealing with the heat from HID.

my wex is currently raising two jalapeno plants that have just started making peppers...

 

[LetsSeeYa]

That looks like a crap grow to me.
One of the pics shows his stretchy lanky plants touching the light. Any LED that produces excess stretch is way under powered. My one watter burns holes in leaves at 4". His buds are lucky to be average in size and he even uses CO2. Im not sold on his 9x expensive LED light grow.

I look forward to seeing if you can get your WEX growing well.

My plant vegged under cfl's were put right into the tent did not stretch at all.

So you went to the link and looked at a few pics. That tells little as you have no clue as to why they did stretch. First post read that he was working on tweaking the lights. Also he had a 1000wter i think is what it was side by side and the plants were stretching over from under the 1000hps to the LED side. Whats that tell ya? Ya really gotta read it man, its one killer set-up and by the way i have the 5 band light to go with the other light, you missed that in my first post. Like i said before im just trying to learn, because i know that they will work great. I am just new to the indoor growing and the LED's, iv grown some with CFL's once.

And if you sell lights, im sure your going to say yours are the best, i would. I just needed to work out some growing methods and get more info, but it seems like a contest in here?

I really dont understand why people just cant share their info, without putting down other growers lights. In less they have something to gain from it? I think given the correct method, i think any halfway working light can give you a good grow. So why are people not sharing these methods? It seem that the answer is ''your light sucks''.. Some people just need to know x-mas tree growing is out of the question.


Mine did this with a plant that got sick outside and then mites, but take a look at her here at a week before harvest NL#5.

 

[Habel]

build your own like this guy...

http://www.ledgrow.eu/diy.html

 

[FreezerBoy]

Cleanup on aisle 4

Cleanup on aisle 4

A page worth of this discussion has been binned for: personal attacks, links to outside forums, videos and off topic postings.

Let's stick to the subject, stay inside the rules and most importantly, play nice.

 

[smokefrogg]

sorry =(

ummm, i saw a grow where this dude had 1 plant live out it's entire life under one of the 14 watt sunshine systems $50 panels

it was very lanky and stringy, but at the end of the day i think he did get 3~4 grams out of it, his tolerance was low apparently and this was just fine for ps for the guy

i have some of the 28 watt sunshine systems panels, i'm not quite curious enough to try doing what he did, but the thought does occasionally cross my mind, i wonder...

 

[spunion]

http://stealthgrow.com/products.htm

^$3500? Quite the investment. Can you actually use this thing for 50,000 hours without losing brightness and having to replace bulbs? I need to subscribe to some LED diaries ^_^

 

[303hydro]

Here's a light I am pretty sure I'm going to check it out.

https://www.icmag.com/ic/showthread.php?t=212640

 

[zappa66]

Has anyone seen these panels? They seem ligit from what I have been reading here.http://cgi.ebay.com/240W-4band-3watt-chipset-professional-LED-grow-light-1_W0QQitemZ220762430369QQihZ012QQcategoryZ42225QQssPageNameZWDVWQQrdZ1QQcmdZViewItem#ht_1279wt_1141

This listing is for the newest most advanced LED growlight available. It is made with all high quality 3 watt chips. Also features newly designed patented 40 degree lenses. Why 40 degree lenses? Most LED grow lights use 120 degree lenses. Some use 60 degree lenses which has 4x the penetration value of the 120 degree lenses. 40 degree lenses have 3x the penetration value of the 60 degree lenses. WOW! Do the math. (40 degree lenses over 3 watt chips) Also has an advance cooling feature. We use slotted aluminum boards, and high powered 7 blade brushless fans with a very powerful pitch for the best possible cooling while still being alot quieter than the standard Made in China lights that are being sold on ebay. The competition uses a piece of sheetmetal, and blows the fans on them. The reason we use aluminum even though it is more expensive than sheetmetal is because it does not retain heat like metal, and the slotted boards allow better air circulation which guarantees the electronics will never overheat. We also use snap conectors for the wiring which alows for easier repair if nessecery, as well as a different high qulity power supply for each color to guarantee none of the electronics are being overworked. We take great pride in our units, and being a fairly new company to the market we are not new to the industry. We have been doing trial and error research for 5 years now, and we only started selling units less than 2 years ago. 2 of our researchers are Botonists, and the other 2 are elecrical engineers who majored in LED design. We have bought and studied over 100 different units, and found that only about 1 out of every 10 had any real effect on plant growth at all. We can deffinitly say that 1 watt chips are to weak for really good plant growth. Now for a long time we felt that the blue 470nm, the red 620 nm, and the other red 660 nm was all the light needed for both vegitation, and flowering, but in our most recent studies in creating an LED unit that is good for both growing, and flowering cycles we have learned that adding broad spectrum white LEDs to it helps not only with the vegitation cycle, but also helps with the transition period from veg. to flowering. Now with these new units we feel that we have perfected the art of growing using LED lights. Also we can offer prices that are competitive to the cheap Chinese lights because we make them rite here, and dont have to pay huge shipping fee's as well as the middleman markup, and rite now we are still a small company, and do all the work our selves. Anyone who is new to this I urge you to do your research. Dont buy lights with unnessecary colors added some of them are toxic, and are only put ther so that they can show high luminous flux levels. Rating an LED grow light on lumins alone is not a good way to rate the light. It should be rated on its (P.A.R.) photosynthetic active radiation. Also watch out for trick advertising like. Cree is a very expensive LED, thus would make the light very expensive. If someone uses all Cree LED's to make this light it would cost about $395.00 to build. So pay attention to the wording next to colors. Notice that usually only the white actually says cree. We wont make any sales tricks on you. We just promise a high quality unit that is built with care. I have action spectrum pics above, and also a pic sent buy a happy customer in California of his garden under our lights. At the bottom of my listing I will have a chart that describes how light affects plant growth. Now let me describe the light itself to you.

We are not a hydroponics store. We are LED growlight manufacturers, and Distributors. The LED's we use are Semiled, Epistar, and Cree. The listing is for the newest most advanced 240 watt 4 band LED growlights made with 3 watt chips and 40 degree lenses. These lights are made from all very high quality materials. They are deffinitly the most advanced LED grow light on Ebay. The 4 bands are blue 470 nm., red 620 nm., red 660 nm,. and white 6,000 kelvins, which is a broad spectrum ranging from 420nm all the way to 615 nm. The breakdown is 18 white 6,000 K, 19 blue 470 nm, 22 red 620 nm, and 22 red 660 nm, 81 LED's in total. They have a P.A.R. (Photosynthetic active radiation) value of 2443 at 60 cm, with all usable light. We do not add infrared, or ultraviolet because they are useless to plants, even though they can make the light meter turn very high numbers, they show no beneficial value to plant growth. Some Infrareds can actually harm the plants. The units also have a very advanced cooling setup, and run quieter than most less powerful fans, and being brushless they are not only quieter, but also have a much better lifespan. We also have a unique smoth start function which slowly powers the unit up. What this feature does is eliminate hard startups which stress the LED's, and usually will cause part of the board to burn out in less than a year. We offer a 3 year warantee on our products from all manufacturers defects.(AND WE HONOR OUR WARANTEES). Also we are here to answer questions for you whenever you have one, and we will also give you info on how to build your own Co2 system using household products. We dont just forget about you after the sale we want to help you have the best garden you possibly can. Below is a chart that will tell you how light affects plant growth.

Range in nanometers How Light Affects Plant Growth

200-280 nm----------- UVC Ultraviolet range which is extremely harmful to plants because it is highly toxic

281-315 nm------------ Includes harmful UVB ultraviolet light which causes plants colors to fade

316-380 nm------------ Range of UVA which is neither harmful or beneficial to plant growth

381-400----------------- start of visible light spectrum. Process of Chlorophyll absorption partialy begins. UV protected plastics block light below this range.

401-520 nm------------ This light includes violet, blue, and green bands. Peak absorption by chlorophyll occurs, and strong infuence on photosynthesis occurs. (PROMOTES HEALTHY VEGITATION)

521-610 nm------------- This range includes green yellow, and orange bands, and has less absorption by pigments.

611-720 nm------------- This is the red band. Large amount of absorption by chlorophyll occurs, and the most significant influence on photosynthesis. (PROMOTES FLOWERING & BUDDING)

721-1,000 nm---------- There is very little to no absorption here. Flowering, and germination is slightly influenced on the low end, at the high end of the band is infrared which is heat.

1,000 + nm------------- Totally infrared range. All energy absorbed at this point is converted to heat, and is completely useless to plant growth .



We keep our add simple because it is all honest. We do not feel the need to over explain or down talk other sellers. We have bought alot of the lights available on ebay to study them, and we can honestly say be careful. There is alot of shady sellers out there. We are not trying to say you should only buy from us, but if you are new to indoor gardening, we highly recomend that you do some research, and ask questions. Alot of the lights look very similar, but believe me it what is inside the lights that matters. It is deffinitly possible for us to use cheap materials, and be able to sell for alot less, but we are trying to build a reputation for quality not quantity. We are available in some stores. Unfortunatly I can not disclose the retailers because of the confidentiality agreement we made with them, and they are being sold under a different business name in stores. The retail price on this unit is $549.99 - $599.99. If you have any questions please feel free to ask. We will answer you within 1 business day. Also if you are looking to buy a large quantity please send us an Email for price arangements. When you buy 4 or more units we will give you a free edison base cloneing bulb valued at $49.99 each. Our goal is to make all of our customers happy. Also we will always leave feedback for buyers it is setup to automatically post immediatly after the buyer leaves our seller feedback. It is setup this way because our whole reason for selling on Ebay is to build a reputation, and feedback is how we do that. There is alot of people who dont leave feedback, after we provide them with exellent service, as well as a high quality products. Good luck to all newcomers, as well as veterin growers. Also as far as energy savings. Using this light in place of a 400 watt High Pressure Sodium light will save between $1,800.00, and $2,500.00 a year on your utility bill, also there will be no need to cool the room down, so you will save on that as well. THAT IS HUGE.

Good luck everyone. Remember we take care of our customers all the way. When you purchase from us we will stay available for questions. Any questions you may have. We are Botonists, and Electrical light engineers, and our specialty, and passion is in this field. We want you to be succesful with your crop.

 

[habeeb]

GLH is good, I still need to do more testing, but I am pleased with there 180 panel.

I don't like the customer service the guy is running.. I think it's out of his house? but he is kinda a pain to deal with if something goes wrong.... I won't get into it, but I hope he has changed his methods as i would like to buy more from him in the future

 

[CLOWD11]

The problem with using 40 degree lens is the lack of coverage. Basicly the light strenght will only be accessed by being inside the 40 degree as measured from the size of the unit. Im using 60 degree lenses and are about to go 90 degree for this reason. Using 40 degree lens with 3w diodes will create problems for the canopy(burn) while attempting or being designed to reach the bottom of the plant. The most likely adverse result will be stunting. A 40 degree lens only spreads 20 degrees either side of the diode direction, so you need to consider this when calcualting coverage and how many lights needed.

 

[sx646522]

It's always amusing to see what ends up on some of these 'manufacturer's web sites. I know for a fact that some of the stuff that I (and a few other folks here and on other forums) contributed - both in discussion, and with data points in chart and graph form regarding spectrum, optimal angles/intensity, and the like - have ended up as 'independent scientific research' cited on several sales sites - like HGL's - and began to be incorporated into the next versions/models released by quite a few folks.

Well, can't claim these guys aren't exactly 'keeping their ears to the ground'...


By the way, the only real reason a manufacturer would use 3w/3 chip LEDs over 1w (if they're 'manufacturing smart') is cost. When you're charging by the watt (and can get away with using fewer emitters), you'll get higher overall margins.

Having lived over in Asia for several years and worked with Chinese and SEA companies on a regular basis, I can tell you the manufacturers are way more interested in finding as many ways as possible to squeeze as much cost out of the production of a panel (while keeping prices the same), rather than using higher quality components or improving the product. Good luck trying to get one of the Shenzhen assemblers to customize these units to actually put in reliable components (unless you can deliver massive volume - and even then, the concept will be foreign to them)

A 3w LED is NOT better than 3 x 1w (separate emitters), and not necessarily even ONE 1w high-bin emitter by any means - for a whole host of reasons, not the least of which is related to poor thermal management issues. The only true indicator of quality and efficacy is in the total lumens of the emitter (per watt, usually), not simply the watts it's wasting to generate that amount of light.

On top of that, many use cheap, inefficient drivers. Many panels struggle to achieve even 75-80% efficiency (80% is being kind here, esp. for some of the stuff you find on eBay) with the drivers they're using (power lost as heat before it even gets to the emitters), while the better ones will consistently do 90%+ (~91-92% realistically, if using variable AC-DC conversion) when driving a proper load. Thus:

(White LED example)

Chinese panel: 0.80 x 0.20 = 16% efficiency
DIY/High Quality: 0.90 x 0.5 = 45% efficiency (281% difference!)


(Typical low-bin, low-quality emitter efficiency range: 20-30%, but 15% is not uncommon at the lower end)
(High-bin, high-quality emitter efficiency range: 40-50%+)


=> Is it any wonder why people get frustrated by some of their results?


...I'll leave thermal management out of this discussion; I've written about it ad nauseam before anyway.

Here you are sm0k4, dont say i never do anything for you!

I hope HGL dont mind me posting their inner workings

That has got to be the worst piece of shit heatsink I've ever seen! (Ok, I've seen worse, but not much. Besides, it's funnier the way I wrote it). No wonder they need to use six fans.

That's hilarious. I see they haven't improved their thermal management at all in the 1 1/2 years since the last peek under the hood...

(and very, very, typical)

...and people wonder why the 'industry' has garnered a bad reputation. I wouldn't wish those anemic-ass heatsinks on my worst enemy. (of which I have none, naturally...)

Yeah i just posted, but im out for info and ran across this site about LED everything. If you've seen it just move on i guess, but anyone that is looking for one point of view, this site gives many different was of looking at them. Interesting that they dont push their hydro stuff, hence its name, but havent seen much at all. I have not read it all, but once im done here, im for sure going to have a look at their 2011 best LED's of the year

Plus the 1w vs 3w LED lighting, ''which is better article'', i read in here or the other thread i follow was brought up was interesting. Makes perfect sense to me, but they are talking about what im doing now so gotta say that read was good

, lol.

Anyway, a ton of info, if your looking.

(edit: links deleted due to scam affiliate content)

Don't know if you noticed, but that is a thinly disguised affiliate site with fake 'reviews' of products designed to get you to follow their links to the manufacturer page in the hopes of generating sales commission $$$ for the feeder site owner. Just your standard pre-sales page, keyword-rich jargon before sending you to the actual 'money' sites.

The guy even mentions getting a 'pre-release' copy of one of the HGL units - before they've even done a single production run. Sounds like bullshit to me.

(See the 'pre-order' pages for the new units on HGL's page, folks? That's so they can get paid for the production from advance sales before committing to making the actual product. Pretty smart, actually - but don't expect them to have given anything out early beforehand. Not THIS company - not by a long shot.)

Wouldn't surprise me to learn that most of the 'feedback' at the bottom of his posts are faked, too...

I would discount pretty much anything said on that site as being on the order of either partial or complete sales BS. Don't be confused by 'marketing'.

Just sayin'.

-SX


P.S. There's only one manufacturer I trust to produce a truly decent (i.e. energy efficient) product right now (using ACTUAL high-bin CREE's et.al.) - and as far as I can tell, no one here is using them (yet).

(And no, they're not cheap. Hint: they're assembled in Spain. )

Even the Lumigrows, while built solidly, are not that efficient when it comes to the watt-vs-light levels. I don't see that they've necessarily updated the actual emitters since the (ES) unit was introduced.

At this point, with the current advances in technology: if you're having to use more than 20-25w/sq ft of LEDs to get decent results, you've got a crappy unit (or rather, a unit using crappy LEDs - and possibly overdriven to compensate, reducing efficiency even further) - PERIOD.

P.P.S. As knna and I (among others) have discussed before on more than one occasion, plants utilize several wavelengths (outside of just blue/red) in a cascading electron transport chain, including yellow/green, and any light that doesn't include at least ~10-15%+ of their output in a broader range is like having a car running with two of its cylinders down.

For those interested, here's the original link to some of the scientific journals for reference (yes, these are now links on HGLs website, too, I believe - Hi, Cameron! ):


(Having only 'green' LEDs for that purpose is taking a rather large step backward.)

(Don't forget about the Emerson Effect, too... or the steady-state between Pr <--> Pfr and the effect Phytochrome has in germination rates, short-day night cycle regeneration (flowering), stretching, and many other things. The world is not just 'black and white' as far as plants are concerned)

 

[LetsSeeYa]

Thanks sx, i was just looking around and thought id found some good reading, but i had no idea that a company would go to that extent to pull business. I really like my lights and i really dont care who says there not any good. My grows are good for where im at as iv grown alway outside. So growing inside in a tent with no ventilation with my two 150 w LED grow bars. I just need to work on my growing methods, but started a thread below if you want to see what iv done so far. I think i need to get my lights closer, but il figure that out when i flip next week.

Thanks again sx


LSY



http://www.icmag.com/ic/showthread.php?t=215239