5-LED 2-Mode Bike Head Light with Quick Release Bracket (3xAAA)

Pros: Fits a road bike handlebar (they're thicker than mountain bikes'). It's somewhat bright, though I never owned others to be able to compare.
Has 3 modes: Fast blinking, slow blinking and always on. It's noticeably darker on always on though.

Cons: You have to unscrew it and take the whole thing from your bike if you don't want it to get stolen when parking outside. It's kinda annoying. Build quality isn't that good.

Other: It's well worth the price.

Pros: Small and bright. Can be easy installed on the rudder.

Cons: Small scratches on the body (may be introduced during shipping), small rust on the internal screws. Has 3 modes: Fast blinking, slow blinking and always on (plain light). First mode altered after button click is 'flashing' but not 'plain light'.

Other: Price does not match the quality of the good.

Pros: It is cheap, it works fine, I am using it with rechargeable batteries and it get enough power and gives enough bright. It is good build and seems to be able to resist some hits, that is good for mountain bike riders, at least for me.

Cons: I have no cons at all for this product the only thing is that at the beginning I try to attach it to the frame but its a little thick to fit into the front bar, then I put it on the handlebar and it is comfortable to handle.

Other: I recommend it at all, but I warn you that if you want to put on the frame it may don't fit and you will have to put it on the handlebar