Around 10 years ago, I purchased a one-hand quick release flashlight handlebar holder that worked great!!! It had a strong heavily rubber coated spring steel clamp that held a 30-32mm diameter flashlight tightly in place and wouldn't ever let it go unless you grabbed the flashlight with your hand and pulled it out. Unfortunately I lost it when the bike was stolen off of my front porch and I can no longer locate this particular flashlight holder. The do make some similar ones but they do not securely hold the flashlight in place and riding over small bumps can jog the flashlight loose and others break in less than a years use. I purchased this unique holder off of ebay but right now I can't find it there or on Amazon. I'm hoping the people who made this strong flashlight clam style holder will read this and start selling these once again because they where the best holders ever!!!! This holder appeared on the market not long after the new superbright LED flashlights where invented. Perhaps someone here knows which holder I'm talking about and will direct me to a place where I can purchase one. This time I'll buy like 20 of them!!!!

I'd like to see what recommendations others come up with -- for strength and security (at a cost of no quick-release), I use interlocking hose clamps tightened down with a wrench.

These rubber bands worked Great for me.

Looks like that blue one didn't work out though...

It is still good I have a bunch of them.