Originally Posted by
diff_lock2
I don't see why you would use mr11's. Apparently mr16s put out a lot more light.
I have JUST started using Halogen lights for night riding. I am using OSRAM's IRC lights, which put out a lot of light for their wattage. They claim 35w halogen light out put from a 20w light. I use their 20w Flood light. Its really good for forest riding, but i really want a 10w spot+10w flood. But they don't make IRCs with such low wattage (or at least i don't think so).
I use commercial headlamp units so I'm constrained to the MR11 by design. I could build the lamp unit but then I'd lose easy interchangeability of the lamps between bikes. Only a few commercial systems ever went with MR16s...probably because of size.
Originally Posted by
diff_lock2
With a 12v 20w bulb and a 3.4Ah 14,4v pack i get 40min bright light and then 20min of dimming light. I need more run time.
Something is wrong with your battery. Your system should draw 1.7A and should give you around 2 hours on a 3.4 Ah battery. I draw 32W from the same size battery at the same voltage and still get over an hour of run time.