patrikantonius
Active Member
Hi everyone!
In order to keep things tidy and not to pollute MajorCoco's journal, I thought it might be a good idea to have a thread to discuss on DIY LED growlights.
So, a few subjects to debate:
What do you guys think ? Personally, I really like the idea of white LEDs, part of this being because it is easier to see the plants under white light than it is under red light![Weed :weed: :weed:](/styles/smilies/weed2.gif)
Some eBay sellers advertise that the output luminous flux can be as high as 50lm at 660nm for the 1w chips. A little bit of math means that they can output 1200mW. If the test is done at 350mA, that means the LEDs can actually output 1.55W of light per watt consumed. This is obviously not possible, but even at 700mA, that would mean 780mW output per consumed watt; where the highest quality bins of Osram Oslon SSL only output 520mW/W (Luxeon Rebel : 460mW/W). Who's to be trusted ? How do the Chinese LEDs compare to Osrams and Philips ?
As I plan to build my own panel, I would be glad to discuss those subjects![Smile :-) :-)](/styles/smilies/icon_smile.gif)
See ya around!
PS: please accept my apologies for my poor English, I'm not a native speaker![Dunce :dunce: :dunce:](/styles/smilies/dunce.gif)
In order to keep things tidy and not to pollute MajorCoco's journal, I thought it might be a good idea to have a thread to discuss on DIY LED growlights.
So, a few subjects to debate:
- White vs blue LEDs to cover the 450ish nanometers part of the spectrum
What do you guys think ? Personally, I really like the idea of white LEDs, part of this being because it is easier to see the plants under white light than it is under red light
![Weed :weed: :weed:](/styles/smilies/weed2.gif)
- LED brands
Some eBay sellers advertise that the output luminous flux can be as high as 50lm at 660nm for the 1w chips. A little bit of math means that they can output 1200mW. If the test is done at 350mA, that means the LEDs can actually output 1.55W of light per watt consumed. This is obviously not possible, but even at 700mA, that would mean 780mW output per consumed watt; where the highest quality bins of Osram Oslon SSL only output 520mW/W (Luxeon Rebel : 460mW/W). Who's to be trusted ? How do the Chinese LEDs compare to Osrams and Philips ?
- Cooling
As I plan to build my own panel, I would be glad to discuss those subjects
![Smile :-) :-)](/styles/smilies/icon_smile.gif)
See ya around!
PS: please accept my apologies for my poor English, I'm not a native speaker
![Dunce :dunce: :dunce:](/styles/smilies/dunce.gif)