polymorphself 

In the market for a light but I ride at night rarely. Haven't used one but the Cygolite mount looks like a little cumbersome compared to a mount like the rubber strap on a Cycle Torch Shark. The Cygolite Dart has a similar mount to the Shark, but doesn't appear bright enough.

Thoughts?

DrIsotope

I really like the Cygolite mount-- it allows L/R adjustment as well as up down, and you can get accessory mounts to hook a Cygolite to... most anything. The GoPro-style mount adapter is particularly useful.

polymorphself 

Is it quick to take on and off? I don't see myself needing the L/R adjustment or accessories given my needs and use. Looking for something very bright, that can be taken off and on in a skip, doesn't move around while riding, and can fit in a mini saddle bag when not in use.

noglider 

It's very quick. You don't have to unscrew it. You can take the light and leave the mount. And even unscrewing the mount is pretty quick. I much prefer it to rubber band mounts.

KraneXL

You neglected to include budget, as the selection to choose from is huge. Lights can cost as little as $25, or as much as $500!

a1penguin

The cygolite mounting system is solid. The mount stays attached to the bike and the light detaches. It really stands up to frequent mounting and unmounting. I've read that the stretchy bands sometimes have issues. If you have a bar that is unusually large or is an weird cross section, a light with the stretchy band might be better. The problem is that if the band breaks or tears, you will have to MacGyver a mounting solution.

polymorphself 

$50 or less.

Both of my bikes are vintage road bikes with drop bars. I was wondering about the stretchy bands have problems over time. Good point about it breaking making the light almost useless without a DIY solution.

polymorphself 

What issues did you have with the rubber band mounts?

noglider 

I just don't like them. I don't trust them to last. For them to work well, they have to be tight, which means I have to pull them very hard. My hands are good at screwing things tight, but I find pulling rubber bands tight to be unpleasant and imprecise. I sometimes I have to try and retry.