Nah, wall losses come in to play in small spaces. Inverse square law dictates light spreads over larger area and loses intensity. Walls reflect that light back to a smaller area, but some is lost in every reflection. The loss quickly becomes significant.
Nah, wall losses come in to play in small spaces. Inverse square law dictates light spreads over larger area and loses intensity. Walls reflect that light back to a smaller area, but some is lost in every reflection. The loss quickly becomes significant.
I would love to see a light made out of lasers! No more trouble with inverse square law and spread 
Wanted to add that it's irrelevant to talk about lumen value of discrete(mono) leds, the lumen curve peaks in the green(550nm) part of the spectrum, blue and red are out of that curve, that's why lumen values are low.
Cheers
Wanted to add that it's irrelevant to talk about lumen value of discrete(mono) leds, the lumen curve peaks in the green(550nm) part of the spectrum, blue and red are out of that curve, that's why lumen values are low.
Cheers
TahoeTops
Active member
I would love to see a light made out of lasers! No more trouble with inverse square law and spread
Wanted to add that it's irrelevant to talk about lumen value of discrete(mono) leds, the lumen curve peaks in the green(550nm) part of the spectrum, blue and red are out of that curve, that's why lumen values are low.
Cheers
Interesting that you say this. "light made out of lasers" I have full color Laser projection systems and have always wondered if I could somehow incorporate them into growing. But that is another topic.
I can verify that with high quality LED's, you can achieve between 1 and 2 grams per watt! The flowers come out extremely dense.
Sunshineinabag
Active member
my bad..
[FONT=Arial, Helvetica, sans-serif]12000 lumens is not much. If the lamp is 7 feet away you would not have much lux left. I just tested my desk LED and 1 inch from the lamp 9000 lux , 1 foot away 2200 lux?
[/FONT][FONT=Arial, Helvetica, sans-serif] So how many lux do you have at the top and the bottom of the plant?[/FONT]
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[FONT=Arial, Helvetica, sans-serif]I know it not the perfect measurement tool, but I don't have $600 odd for a PAR meter.. Lux will give me a reasonable, repeatable way to measure light. Once I can get 70,000 lux all over my plants 1.5 sq foot buckets @ 100 watts, I will be happy...[/FONT]
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[FONT=Arial, Helvetica, sans-serif]In the interest of truth justice and the comics, any static measurement about your grow is YOUR data. Yes it can be a yard stick,but its still really a variable.[/FONT]
[FONT=Arial, Helvetica, sans-serif][URL=https://www.icmag.com/ic/picture.php?albumid=84027&pictureid=2064327&thumb=1]View Image[/URL]
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[FONT=Arial, Helvetica, sans-serif]Consider light to be the Catalyst for all other cardinal parameters, it seems to me logical to get the light as best you can.[/FONT]
[FONT=Arial, Helvetica, sans-serif]Watts per Gram is great for YOUR light source, however consider the impact of the other parameters, is your heat /cooling sources the same, temperature nutes etc. Will all the all the values be the same as yours?? Nope so debating [/FONT][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]Watts per Gram is more mental masturbation than a reliable data source.
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[FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]https://www.nature.com/articles/s41438-020-0283-7 LED info..[/FONT][/FONT]
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[FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]https://www.youtube.com/watch?v=ID9rE5JewVg[/FONT][/FONT] Dr. Bruce Bugbee he knoweth what he clicketh.
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Lumens are fer humans
You all keep debating and pulling up data to fit your needs.
Meanwhile, I am very busy at work, using LESS ELECTRICITY, expanding my grow and producing quality product.
Try it, you might like it.
https://www.ebay.com/itm/Deformable...rand=Unbranded&_trksid=p2060778.c100290.m3507
Meanwhile, I am very busy at work, using LESS ELECTRICITY, expanding my grow and producing quality product.
Try it, you might like it.
https://www.ebay.com/itm/Deformable...rand=Unbranded&_trksid=p2060778.c100290.m3507
SuperBadGrower
Active member
Hello Mr. Broken Record
HPS:
Output: ~150.000 lumens
Power: 1000 W
Chinese POS:
Output: ~12.000 lumens
Power: 120 W
So to achieve "150.000 lumens" needs 1500 watts.
To buy 1500 watts of this dogshit led lighting costs
= $293,87 USD
And that's assuming the luminous flux is not overestimated. with these things you can probably expect to replace your 1kW with 1600 watts. What a deal!
You are takin steps back and celebrating it
^i'm guessing the efficacy is about the same as hps, which isn't bad. For my 2x4 I'd rather use 4-6 of these than hps, but, yeah, we are in the led section and most of us commenting are already led converts with fixtures that produce significantly more light per watt.
SuperBadGrower
Active member
Yeah all those hps photons wont hit the plants either after reflector losses etc ... its just lame to come with stuff that is ostensibly 66% as good as hps at converting energy to light, in a thread about hps vs led. IMO
I think he's a salesman for those lights. I wonder why he's never posted any good bud picks from what he's grown under those crappy lights.
Also I think it's pretty funny any time anyone talks about lumen ratings of any screw in type LED, since manufactures are known to lie about their numbers on the regular. 12k lumens from 120watts, seems like a nice round easy convenient number that buyers will like to see, but to me seems super unlikely to be a real number.
One of my concerns is how to tell if or when singular diodes start fading efficiency or output wise, then when one or more diodes do fail, do you send it for warranty replacement or will there be a repair kit ect? just seems some questions unanswered to be completely sold on LED fixtures.
I am currently more interested in CMH than LED...ill wait until the LED prices come down to reality.
I am currently more interested in CMH than LED...ill wait until the LED prices come down to reality.
I can only speak of the Gavita's, as I own 2 of them. There are over 3300 diodes in them, probably 1/3 more than any other LED. They use newer, high end drivers too and purposely don't push them like other company's, therefore the diodes tend to last longer. Gavita offers a 5 year warranty, everyone else offers just 3 years. BUT, they only accept warranty returns if 15% or more of the diodes stop working.
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bs0
Active member
Got a link (please?) to the dion cob resource? Much appreciated.
Apparently there 150lm+/w screw in bulbs now and they aren't expensive.
O
I read about them in a discussion. There maybe others, but vtac evolution series was mentioned. I found them for 3.60€ per 9.5w 160lm/w bulb. They have floodlights and others too.
https://www.cbelektro.sk/eshop/ziar...000k-1521lm-a60-vt-2310-v-tac/p-4794952.xhtml
Using those you need ~48 bulbs to reach 1000 umol (i'm guesstimating based on 4000k lm301b) and that would be 172€ for the bulbs. Power draw would be 456 watts. Efficacy 2.19 umol/j
I read about them in a discussion. There maybe others, but vtac evolution series was mentioned. I found them for 3.60€ per 9.5w 160lm/w bulb. They have floodlights and others too.
https://www.cbelektro.sk/eshop/ziar...000k-1521lm-a60-vt-2310-v-tac/p-4794952.xhtml
Using those you need ~48 bulbs to reach 1000 umol (i'm guesstimating based on 4000k lm301b) and that would be 172€ for the bulbs. Power draw would be 456 watts. Efficacy 2.19 umol/j
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Holy sheeet! That means screw in bulbs beat 1000w DE HPS efficacy! And at lower startup price?!?!?
Edit: phew, got confused and it's still more expensive of course. We need 100 bulbs and 360€ for the bulbs to match a 1000w de hps.
Edit: phew, got confused and it's still more expensive of course. We need 100 bulbs and 360€ for the bulbs to match a 1000w de hps.
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Im'One
Active member
I grew a romulan grapefruit female from seeds, then clones from her under my previous set up
15 nine watt LEDs wth globes on.
Switched this last grow to fifteen Watters and took the globes off.
Mixed 3500 and 5000k both times...I smoked a joint from my last grow and it was substantially stronger and had about 30 percent more yield.
Currently I have some of this same clones in my greenhouse, they started blooming in july when I put them in greenhouse? Then reveg and now are adding pistols and stacking again. It will be interesting to see what this batch yields and smoke quality?
15 nine watt LEDs wth globes on.
Switched this last grow to fifteen Watters and took the globes off.
Mixed 3500 and 5000k both times...I smoked a joint from my last grow and it was substantially stronger and had about 30 percent more yield.
Currently I have some of this same clones in my greenhouse, they started blooming in july when I put them in greenhouse? Then reveg and now are adding pistols and stacking again. It will be interesting to see what this batch yields and smoke quality?
This is a 120 Watt deformable 4 paddle LED at work.
I assure you it is the brightest interior light I have ever encountered.
Check ebay. I found a new 150 Watt deformable. Remember all you do is screw these in to a socket.
https://ibb.co/T1LVgw5
I assure you it is the brightest interior light I have ever encountered.
Check ebay. I found a new 150 Watt deformable. Remember all you do is screw these in to a socket.
https://ibb.co/T1LVgw5
Here is my Malawi mother plant growing like no tomorrow under the 120 Watt deformable LED.
This is a dream come true folks. Fucking laser beams!!!!!
https://ibb.co/XpdvfZQ
This is a dream come true folks. Fucking laser beams!!!!!
https://ibb.co/XpdvfZQ
Here is my young mother Malawi. She is quite content and growing very nicely.
These fucking lights are insane.
https://ibb.co/jbg4HDw
These fucking lights are insane.
https://ibb.co/jbg4HDw
