I am developing a bike light that runs off of a 3.7V Li-Ion battery. I am currently running 3*10mm Ultra Bright White LEDs (~25,000mcd each). They each draw 20mA.
I am relatively happy with the ratio between their brightness and their current draw...but I would like to get the lights a little brighter, without chewing up my 1200mAh battery to quickly. And these LEDs are not very expensive, either.
I am currently using through hole LEDs, but am open to SMDs or any other solution you may have.
Thanks,
Rob.