"However, you are dead wrong on plant growth. Plant bulk is directly related to how much photosynthesis takes place"

Know I know you're just dead wrong. Grow tomatoes under pure red light (which provides the greatest quantity of photosynthesis) and get back to me on your results. The kind people over at greenpinelane already went through this about half a dozen times, over and over again. YOU NEED BLUE LIGHT FOR BULK. Again, this is why metal halide and CMH are used in large-scale commercial horticultural operations.

Want to place a bet on who is right and who is wrong? I do this GLOBALLY for a living. If I were wrong about this, I'd have been sued by many LARGE global corporations A LONG TIME AGO, and not only that but those corporations with on-staff PhDs in plant biology would have outed me LONG ago. Instead, I keep getting calls asking "When is your new phosphor blend going to be available! when is your new diode emitter design going to be finished? have you finished research on your new HID light? Here's a bonus reward for improving our operations and productivity!"

Yea, while all those scientific studies you point out are nice, the plain and simple tested proven fact for the past 50 years is YOU NEED BLUE LIGHT, and in FAR greater quantities than what NASA determined originally.

As for the picture - How convenient? Not my fault NASA updates their pages fairly frequently with different images! What, you expect a constantly-updating mission to keep the same page, images, or even text? I most certainly hope you don't, that would be rather fallacious.
khyberkitsune Reviewed by khyberkitsune on . Calling out to Weezard for LED advice My friend, I've read your stuff here and at Steve F.'s site. I want to build a dedicated flowering lamp using Ledengin 15 watters. (4 reds, 1 blue, and possibly 1 warm white; LM 317's so I can tweak the ratios.) Essentially, a copy of your 4+1 cake pan lamp but built on a 4 x 18" finned heatsink so I can see what's going on under it.) If I were to post my picks for power supply, resistor ratings / values, etc., would you critique and perhaps offer some guidance? I have already purchased Rating: 5