I have a 1 Watt LED for a reason - because it provides plenty of light and has a long runtime. Any light that consumes more power/Watts would provide more light than I need, and not run as long, so a brighter light would be LESS useful for me.
That is the voice of reason.
Choose the light that works for you. Period.
If that's an LED light, go with it, a HID, a Halogen, whatever.
It's YOUR commute, only YOU know what will work.