Need a very bright "light stick" for night photography, ideas needed

I'm searching for a very bright light stick or something I could use for making some night photos with long exposures. I tried using cold cathode lights but having a problem running them off a battery source, not to mention the glass is a bit fragile.

I was thinking of using glow sticks like the high intensity ones, but I would like to have the ability to turn them on and off. My other idea is using a powerful LED light with a color tube but I was really hoping I could get some rich colors like the cold cathode tubes can make.

Any ideas? I live in a no-fireworks area so that's not available.

Thanks,
Rob

Have a look at this thread: https://photography-on-the.net/forum/showthre​ad.php?t=857344

http://www.flowtoys.co​m/home.php?cat=7

possibly? they can be blinking or solid, many combinations, all shown here http://www.flowtoys.co​m/pages.php?pageid=10

(not affiliated but I own some of their products)

Thanks! I think I'm going with cold cathode instead.

http://www.diyphotogra​phy.net …-art-using-a-cold-cathode