What diode should I use for my motorcycle's dual headlight setup?

[tintumat]

I need to know what diode to use for the following spec:

I need to use this for my motorcycle. I have 2 xenon headlamps working on my bike but 1 lamp lits up for low beam and the other for high beam, now I need to light up both which means I've got to use a diode. Need to know which is the best diode for this purpose?

Battery output: 12v, 4A
Headlight output: 12v, 35w
Xenon Ballast input voltage, 9-16v

 

[Antiphon]

Post a schematic. If you have a single ballast and two arc lamps you can't run them both.

 

[tintumat]

I have two ballast individually for both the lamps. But when i turn on the low beam one bulb lights up n for the high beam the other bulbs lights up. I need both the bulbs to light up when i turn on High beam. Th e output voltage for the bulb is 12v, 35w.

 

[vk6kro]

[PLAIN]http://dl.dropbox.com/u/4222062/lamps.PNG

The diode would be carrying about 3 amps, but should be rated for about 6 amps. It would need to be the type you can mount on a heatsink. Insulate the heat sink from ground.