I've been wanting to go to AC for years & finally pulled the trigger for mid-June. I'm not gonna get on anything with a motor until I get back on the plane (OK, I might go fishing). Sooo, Do the bikes have lights?...Should I bring a flashlight?....Does it even matter?

Yes...Highly suggest a light..it's required to have a small light for the bikes...never saw them give anyone a ticket..but the taxi's at night tend to go pretty fast, so it's a good idea...
Have a GREAT trip!!! You'll never be the same...

Flashlights are also handy for when the power goes off, they are available in San Pedro, just expensive. Of course it doesn't matter once you are on Ambergris!
Belize it!