Hi LivingLight, Lumens is a measure of the light emitted that best fit human eye response, so lm is useful for led comparison but is almost impossible to get umol from lumens. Concerning the photon flux, a 3000k led usually produce approximately 4.8umol/j. So for each radiant watt you are supposed t...

Hello folks I was looking for an additional red-blue strips for my lightening system, when I found this one on digikey: https://media.digikey.com/pdf/Data%20Sheets/Thomas%20Research%20Products/132541_Ds.pdf What do you think about it? Currently I have 4 LUXEON 1208 COBs running at 150W for an extima...

Hello folks I've recently built a modular Lumileds LUXEON COB light with 6 L2C2-1208 COBs, to cool down the cobs I used three big heatsinks from fischerelektronik the SK89 with a passive thermal resistance of 1K/W, and placed 2 cobs for each heatsink. I rum my 1208 cobs at 1050mA, which means 37.8 W...