heres what daxs says on his website Max Output of .5 A 7.5V.
and the lite on my bike is 7.5 vlots and my bike runs just fine you just cant start it with light on so you will need a switch so you can turn it on once you get the bike started
The original poster means horsepower, not electrical wattage. Most of the world outside North America rates motors in kilowatts, not horsepower. As stated above, HPX746=watts. So, what's the horsepower of those little things?