E
ESTERCHASER
glad i asked before assuming!!!!!
Off the shelf retail store screw-in LED and CFL bulb comparisons
- Thread starter blynx
- Start date
PCBuds
Well-known member
dude love your set up nice work!!!
You're welcome
Keep an eye out for light bleaching and pale leaves.
come check my garden
Thanks again have a good week.https://www.icmag.com/ic/showthread.php?t=339293&page=21
Hookahhead
Active member
I went to the capital over the weekend. We have these large “Chinese import” stores that has all sorts of generic stuff direct from China. I knew they had LED drivers so I stopped in to grab one.
I got a 12v 10A box for less than $10
It came set at 11.84V from the factory, but has a pot to adjust it.
I wanted to see if this thing would power the 9w boards I was testing a few pages back. I left it set at 11.84V thinking it would be best to underpower than overpower for my initial trials. I hooked up the LEDs, held my breath, and plugged it in... nothing. I turned the dial up to 12V then to 12.68V and still nothing.
I didn’t want to turn the dial up any higher so I ended my trial there. I have some experience with using this type of driver to power multiple strands of LED tape. We were using 25A and 30A versions though and those all had a 120mm computer fan built in. This box does not, so I don’t know if that’s because it’s the cheapest build possible or you just don’t need to compensate for heat until higher amperage. I’m guessing it’s the cheapest haha.
So it looks like if my initial tests were right, the board was being driven with 107.4V DC. (old pic)
If we ignore any loss from the SIL driver and assume the bulb actually draws 9w... the math for the current works out to 9W/107.4V = 0.084A. There are 36 chips on the board... that’s pretty much where my understanding off all of this stops. I had hoped that I could just mount up a few of these plates up and run them like the strips or the tape. That doesn’t seem to be the case, at least with these boards. Now that I have a driver on hand, I can test out other boards that come my way.
P.S. ScrogMonster see this post about your picture problem.
I got a 12v 10A box for less than $10
It came set at 11.84V from the factory, but has a pot to adjust it.
I wanted to see if this thing would power the 9w boards I was testing a few pages back. I left it set at 11.84V thinking it would be best to underpower than overpower for my initial trials. I hooked up the LEDs, held my breath, and plugged it in... nothing. I turned the dial up to 12V then to 12.68V and still nothing.
I didn’t want to turn the dial up any higher so I ended my trial there. I have some experience with using this type of driver to power multiple strands of LED tape. We were using 25A and 30A versions though and those all had a 120mm computer fan built in. This box does not, so I don’t know if that’s because it’s the cheapest build possible or you just don’t need to compensate for heat until higher amperage. I’m guessing it’s the cheapest haha.
So it looks like if my initial tests were right, the board was being driven with 107.4V DC. (old pic)
If we ignore any loss from the SIL driver and assume the bulb actually draws 9w... the math for the current works out to 9W/107.4V = 0.084A. There are 36 chips on the board... that’s pretty much where my understanding off all of this stops. I had hoped that I could just mount up a few of these plates up and run them like the strips or the tape. That doesn’t seem to be the case, at least with these boards. Now that I have a driver on hand, I can test out other boards that come my way.
P.S. ScrogMonster see this post about your picture problem.
Hookahhead
Active member
I looked more into the Edison bulbs igrowone mentioned earlier. I found this page that offers a great explanation.
https://ledlam.co.uk/how-do-led-filament-work
Edited: I found this interesting bit in the comments
And this great YouTube video
[YOUTUBEIF]https://m.youtube.com/watch?v=H_XiunR-cAQ[/YOUTUBEIF]
https://m.youtube.com/watch?v=H_XiunR-cAQ
Yet another rabbit hole for PCBuds to explore
https://ledlam.co.uk/how-do-led-filament-work
Edited: I found this interesting bit in the comments
And this great YouTube video
[YOUTUBEIF]https://m.youtube.com/watch?v=H_XiunR-cAQ[/YOUTUBEIF]
https://m.youtube.com/watch?v=H_XiunR-cAQ
Yet another rabbit hole for PCBuds to explore
Last edited:
PCBuds
Well-known member
Try touching the 12 V directly to either side of a single LED segment.
I know they're supposed to have 3-4 V forward bias but my segments measured ~12 V when the bulb was running and I got the segments lit at 12 V (they just started to glow at 7 V)
Swap the + & - on the segment if it doesn't light.
I think it's a heat dissipation thing.
My driver is 500 Watts, 24 V, and 20 Amps and has a fan.
Yours would be around 120 Watts and can dissipate it's heat without a fan. (just lots of holes to help it breathe ).
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Thanks for the reply, I do believe that is part of the problem.
PCBuds
Well-known member
I looked more into the Edison bulbs igrowone mentioned earlier. I found this page that offers a great explanation.
https://ledlam.co.uk/how-do-led-filament-work
And this great YouTube video
[YOUTUBEIF]https://m.youtube.com/watch?v=H_XiunR-cAQ[/YOUTUBEIF]
https://m.youtube.com/watch?v=H_XiunR-cAQ
Yet another rabbit hole for PCBuds to explore
I read the explanation and it makes sense to me.
I remember someone mentioning that they didn't seem very bright but I think it's kind of an optical illusion.
If each little strip was shrunk down to a small single spot of light, it would appear a lot brighter even though its got the same Im/Watt.
I watched the video and like the way he must have spent countless hours making something that just doesn't matter.
I can relate to that. Lol
I'm sticking with my strips now.
I've pulled enough crap out of the rabbit hole. Lol
Hookahhead
Active member
I liked this part from the LED article.
Referencing the HTGSupply site again, it looks like most HPS bulbs are advertised at 2100k.
A 1000w hortilux
2200k LED compared to 4125K moonlight
Interestingly I found this image on an article for the Honolulu civil beat talking about using LED as street lights. The article discusses the difference between 4000K LED and 2200K LED in regards to matching moonlight. Aside from the this being the first time I’ve seen a moonlight spectrum, I was quite surprised to see how far into UV and IR their results show. It’s not the normal truncated visible range you see elsewhere.
Seeing the Light: City’s LED Project Needs Revisions: https://www.civilbeat.org/2015/08/seeing-the-light-citys-led-project-needs-revisions/
Referencing the HTGSupply site again, it looks like most HPS bulbs are advertised at 2100k.
A 1000w hortilux
2200k LED compared to 4125K moonlight
Interestingly I found this image on an article for the Honolulu civil beat talking about using LED as street lights. The article discusses the difference between 4000K LED and 2200K LED in regards to matching moonlight. Aside from the this being the first time I’ve seen a moonlight spectrum, I was quite surprised to see how far into UV and IR their results show. It’s not the normal truncated visible range you see elsewhere.
Seeing the Light: City’s LED Project Needs Revisions: https://www.civilbeat.org/2015/08/seeing-the-light-citys-led-project-needs-revisions/
Hookahhead
Active member
It’s been quiet in here lately. I finally have my “machine” fully assembled, now to just keep it running smoothly.
Clones 3x1.5 ft under 34 watts
Small plants, each level is 4.15 sq ft. Top is under 114w, button is under 56w.
Big plants are under 20x14w (280w) bulbs covering a roughly 3x3 area.
The plants spend approximately 2 weeks in each stage. Finally they get moved out to the “screen house”, that runs fully on solar energy.
Grand total of 21.8 sq ft lit under 484w of SIL
Clones 3x1.5 ft under 34 watts
Small plants, each level is 4.15 sq ft. Top is under 114w, button is under 56w.
Big plants are under 20x14w (280w) bulbs covering a roughly 3x3 area.
The plants spend approximately 2 weeks in each stage. Finally they get moved out to the “screen house”, that runs fully on solar energy.
Grand total of 21.8 sq ft lit under 484w of SIL
Cool screen house.
FRANKENBUDS
Member
I could spend hours inside that screen house. How nice it will be to grow outdoors someday
FRANKENBUDS
Member
This post right here..
Thank you!!
I'm not sure I agree with that, and apparently neither does my nute bottle..
Attachments
Hookahhead
Active member
I like checking out all of the different LED options when I go into a new store. Here’s some things I saw on my trip today.
First thing that caught my eye was these anti insect bulbs. As far as I can tell there may be yellow LEDs inside. The store had a display setup and it the globe had a yellow glow, i would have liked to take a peak inside haha. They have low advertised efficiency at 620 lm for 9w.
I did find the spec sheet online.
https://sylvania-andina.com/co/wp-content/uploads/2019/10/1.-FT-P27365.pdf
Osram has their own version, which I find more interesting. It’s labeled as a Dual LED light and shows advertises 806 lm for 8w.
I couldn’t find a spec sheet or more information about this specific bulb. If anyone else cares to do a search, I’d be interested to see it. I believe it switches between daylight and a yellow light based off flipping the switch as this bulb does.
https://www.illuminer.com.mx/especiales/398-foco-repelente-led-dual-8w.html
I did find a video on what I believe may show the inside of a similar bulb. I haven’t figured out how to properly embed YouTube videos on ICMag, so here’s a link.
https://m.youtube.com/watch?v=bVBUjXmWC2w
There is also a version that attracts and “zaps” the insects too. I really like this guys channel.
https://youtu.be/Mz3RWYn7jQY
Next up are the big boys, 50W, 80W, and 100W. I’m guessing these have COBs inside. They all had similar advertised ratings, this one shows 9000 lm at 100W.
Then the Edison bulbs. I saw 2-6W versions. The 6w cool white had the highest efficiency at 700lm for 6W. This is higher than the opaque globed SILs most of us use, but I’m guessing this is due to the clear globe. I would still like to see a larger light based off these filaments.
The final light was a fluorescent replacement. I was kind of shocked to see it advertised at 23W and 3600lm. This is higher than other similar bulbs I’ve seen. This was a complete fixture, and was 60$ so I didn’t check it out further.
First thing that caught my eye was these anti insect bulbs. As far as I can tell there may be yellow LEDs inside. The store had a display setup and it the globe had a yellow glow, i would have liked to take a peak inside haha. They have low advertised efficiency at 620 lm for 9w.
I did find the spec sheet online.
https://sylvania-andina.com/co/wp-content/uploads/2019/10/1.-FT-P27365.pdf
Osram has their own version, which I find more interesting. It’s labeled as a Dual LED light and shows advertises 806 lm for 8w.
I couldn’t find a spec sheet or more information about this specific bulb. If anyone else cares to do a search, I’d be interested to see it. I believe it switches between daylight and a yellow light based off flipping the switch as this bulb does.
https://www.illuminer.com.mx/especiales/398-foco-repelente-led-dual-8w.html
I did find a video on what I believe may show the inside of a similar bulb. I haven’t figured out how to properly embed YouTube videos on ICMag, so here’s a link.
https://m.youtube.com/watch?v=bVBUjXmWC2w
There is also a version that attracts and “zaps” the insects too. I really like this guys channel.
https://youtu.be/Mz3RWYn7jQY
Next up are the big boys, 50W, 80W, and 100W. I’m guessing these have COBs inside. They all had similar advertised ratings, this one shows 9000 lm at 100W.
Then the Edison bulbs. I saw 2-6W versions. The 6w cool white had the highest efficiency at 700lm for 6W. This is higher than the opaque globed SILs most of us use, but I’m guessing this is due to the clear globe. I would still like to see a larger light based off these filaments.
The final light was a fluorescent replacement. I was kind of shocked to see it advertised at 23W and 3600lm. This is higher than other similar bulbs I’ve seen. This was a complete fixture, and was 60$ so I didn’t check it out further.
PCBuds
Well-known member
My understanding is that seedlings get only water until they've got two full sets of leaves but clones get nutes right from the start.
(although I've never grown a clone.)
