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XBD 2600K Power in : 1.00 W (2.85V x 0.35A) Luminous flux : 114 lumen Efficacy : 114 lumen/W LER : 342 lumen/W Radiometric eff.: 33.4% <> 35.25%Radiant flux : 0.33 W <> 0.3517 W Photon flux : 1.62 umol/s (1.62 per Watt) <> 1.71 umol/s (1.714 per W) Blue...

Warning, All these computation are not real measurements made with spectrometer. I only use led's datasheets and a DIY software. Excel is cheaper than a good spectrometer like http://www.led-measurement.com/BTS256-LED-tester/

Hans led panel made with OSLON SSL80 (Tj=50°C) - 4 LD-CQ7P 2U - 17 LR-CP7P JS-JT - 10 LH-CP7P 3T-4T - 2 LUW-CR7P EQW LS-LT Total consumption : 32.57 W Radiant Power : 11.383 W umol/s = 57.182 Optical efficiency 34.95% & 1.755 umol/s/W Better than Cree setup.

If pdf files wanted, contact me via PM! Next computation = Hans Panel made with OSLON SSL. I will compute radiant flux and irradiance at 0.3 - 0.4 - 0.5 meter high

I analyzed the Hans Grow Led Light http://www.bonsaihero.com/ledgrow-led-panel-80-watt.html and synthetised all the computation. - Astir Design with Cree and Oslon leds - Astir Design with only Oslon SSL 80 leds - Area 51 SGS-160 - Hans Led Panel For these four design a made charts to compare...

For efficiency Oslon is always the best :-P

And just for fun, I analyzed the Area 51 SGS-160 light. I made some assumption : The SGS-160 is made with 48 Cree XPG Outdoor ( 3700K-5000K) and 24 Cree XPE Red. As I can easily find these leds with top group ...

For the next setup, I will use: - 2 Oslon SSL 80 LCW CR7P-PC (Tj 50° - 350 mA / 3.0V > 137 lm) = 0.840 W & 3.9 umol - 4 Oslon SSL 80 LCW CR7P-EC (Tj 50° - 350 mA / 3.0V > 118.58 lm) = 1.548 W & 7.6 umol - 16 Oslon SSL 80 LCW CR7P-CC (Tj 50° - 350 mA / 3.0V > 95.06 lm) = 5.633 W & 27.92 umol - 2...

For better explanation : I try to compare ASTIR setup to other setup. As ASTIR use Edison led or same led design and as I don't find the datasheet of these leds, I use Cree XTE and Oslon SSL150 leds data. ASTIR Panel using website data http://astirgrows.com/ - 2 CW - 4 NW - 16 WW - 2 Red 630nm...

A made some computation with DIY software. I use : - 4 LR-CP7P drive 700mA => 108.5 lm each Pc=1.73W - 12 XTE White 2200K CCT drive 700mA => 167 lm each Pc=2.13W - 2 XTE White 2600K-3700K drive 700mA => 203 lm each Pc=2.13W -6 XTE White 5000K-8000K drive 700mA => 217 lm each Pc=2.13W Compute...

I think I will divide this setup by two.

I built a little led grow lamp, but as I am not as good in biology as I am in electronic, I try to adjust this setup to match perfectly with veg and flow. So here are the specs of my setup: 395-400 nm > 14.35 W/m² - 50 umol/m²/s 405-410 nm > 14.35 W/m² - 51.65 umol/m²/s 442 nm >...

Ok, using outer space irradiance is too much so, I will use "Global Tilt" values ( "Global Tilt" = spectral radiation from solar disk plus sky diffuse and diffuse reflected from ground on south facing surface tilted 37 deg from horizontal). For full spectrum GT irradiance is approximately 1045...

You are right, I forgot one zero for the umol/m²/s values ! Thank you corrected me !

Hello, So, here is my reasoning to design my DIY led lamp First assumption : As I want to made an indoor grow, I want to have the same irradiance than the sun can do. Perhaps 25% more to see if I can improve the final amount Second assumption : As the range of wavelength for...