almost no difference what the battery voltage is because modern electronics can convert it to whatever voltage is needed.
No, of course it does - you either give up run time, or simply don't power the light well.
I have a 7 year old HID that's finally giving out and I plan to get a decent LED in the 600 lumen range.
And no doubt, they both will run from a 6V or more source.......
For the sake of discussion I was referring to
luminous watts. But for anyone who cares, if you know anything about modern LEDs then you'll know you'll want or need an LED that draws at least three watts of
power. And that - ladies and gents means you'll want some batteries.........
As far as the original thread is concerned - knowing bike lighting "terms" still won't guarantee satisfaction because there is more to the quality of any lighting system than numerical specs. But my experience suggests that if you need to
"see" anything for any length of time you'll need a more powerful system. And they are generally six or more volts.