Quote Originally Posted by RackitMan
What is the theoretically optimal on/off time period?

Does overdriving the 1w LEDs to 3w increase the light output roughly 3 times?
Depends on the duty cycle used. We're playing with 10% duty cycle right now.

As for putting out 3 times as much light, sadly no, the best we're getting is about 2.3x. There's always a ROI wall that you hit, and it's all in the materials used for the construction of the diode.
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