First, i listen to advice, and take that into consideration. Then, since I have a small outlay in cash, I experiment.

Talking about flashlights and their holders..
I am using this holder..These are $4.00 flashlights.. Moving up to $20 and $30 flashlights, and will give this mount a try..In other words, I will be riding some bumpy roads and see what happens. So far, I have rode bumpy roads with these, and they hold tight and work fine. Also, I can moved them up or down, and they stay that way. So, when my $20 and $30 flashlights get here, I will try this mount, another cheap one, if they even look like they will fail, I will get some thing better. In the meantime, these mounts cost about $2.50.
This cheap setup throws a nice beam, with and appropiate flood. The mounts haven't failed..Will try them on the slight larger flashlights when they arrived..