I think I'm gonna get two ring clamps (one on handlebar, other one slid thru perpendicularly, holding my flashlight) and a Coast LED Lenser P7 flashlight.
I bought my first Coast flashlight at WalMart a couple years ago and have loved it, but the button on mine actually got stuck, so I bought a new one with "focusable prism reflector" light, model no. 7436. It's AMAZING light for 2 AA batteries... the optics on this lens are mind-boggling!! There aren't really "dark spots" like you'd see with other focusing lenses because of the way the lens is shaped.
Anyway, this 7436 Coast flashlight (only 41 lumens) is MUCH better than my narrow-beamed Cateye EL530. That thing is a piece of junk, and nobody should ever buy it for a MB... it's useless.
As great as the 7436 is, I'd prefer a bit more light... so I'm also gonna buy the 7345s (6-LED design, non-focusable) and P7-8407 (167 lumens, focusable lens) from
this site. I'm trying to figure out if the 6-LED cloverleaf design provides a wider beam, or at least a brighter beam when the focusable light has the same beam width. Either way, I'll never be able to own enough of these flashlights, and everybody here should try one of 'em.
The P7 is prolly a bit much ($100) for a bicycle headlight, but I think it'll be worth it to me. It's supposed to put out 167 lumens (711 feet effective range) for 130 hours just from 4-AAA batteries & one single 4.45 Watt LED!!!! I'd essentially never need to worry about batteries again, or wiring anything up & using the tiniest extra bit of gas... and I'll certainly be able to see everything in front of me, which is most important.