I tried this first on my tall bike
, I just bought some CCFL's at Fry's and zip-tied them on, powered by a lead acid battery i had laying around. It was pretty cool, but i broke a tube a few days later, Simply zip-tying the tubes on caused them to flex, and any further pressure would cause the glass inide to flex, not something glass should do!
I decided to add a strip of polished aluminum behind the tubes to act as a reflector, directing more light downward, and to help reinforce the acrylic tubes. In addition it would mean the straps would not go over the tubes but under, alleviating the source of bending, and not obscuring the light.I'd also want a better battery pack, as six pounds of lead is hardly noticed on already heavy tallbike, but not really welcome on nice lightweight bikes.