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.