[john]

Originally Posted by robertozm

If I buy from ULTIMASTORE - Energy Saving Lamps, LED'S, LED and put a few of them in parallel will it work?

As these are rated at 12V, you can simply put 3 of them in series and connect them directly to your 36V battery.

They will however dim a little as the battery runs down so you could do what I have done and put 2 in series with a regulator (LM317T - these only cost pennies).

BTW I now use MR16s from here eBay UK Shop - IT Global Solutions: Lighting, Radiator as I find them more directional and so give a better beem although they are more sensitive to voltage drop.