@GG That is a great service the growing community side by side HPS vs LED, elite cut, organic soil, lab tested. Thank you! cant wait to see the results
@red LOL at 420lm/W. You must be misunderstanding the specs my friend, but I wish that were true.
@never sorry I just went back and checked your thread, did not see your reply with the pics of the fins, I will retract that statement. A heatsink temp of 100F is not terrible. I can assure you though, the warm whites are nowhere near 110lm/W dissipating 40W at those high currents and high temps. I have poured over the specs sheets that I could find for those COBs and determined that they are actually more expensive/photon than the Crees, and that is not taking into consideration the electrical savings of the Cree. That said, they might still grow some good pot and I say, use what you have got on hand. I am just trying to warn new buyers not to expect the results of the Crees or Veros from generic COBs. Honestly, I believe HPS would be a better bet.