13 watts? Replace the front turns and tail light with LEDs and you'll get 8 watts back in running mode. Swap out the indicator and speedo bulbs with LEDs for a couple more watts. You'll have no problem running both headlight and auxilary light at the same time.
You mean you don't? Absolutly love riding/exploring at night. It sure does make you wish for more lighting than stock. I went a differant direction and bought a helmet mounted light, but don't want to poach this thread, so will post pics/review elsewhere.