Originally Posted by
flammenwurfer
How big/how many supercapacitors would it take to run that Luxeon 3 led thing for 30 seconds?
A single 5.5V 1F supercap on one led would keep it bright enough to "be seen" for 30s.
Again 3 LEDs is over the top and you triple your heat problem. I'd stick with one. Maybe even one on a doubler circuit(see pilom.com) to limit it to 250mA.
The endor star is a very very floody beam and not really what you want on your bike.