Apparently this stuff can be used to read by and does not require batteries or recharging.

http://www.createthefuturecontest.com/pages/view/entriesdetail.html?entryID=567

http://www.glopaint.com/SprayCans.htm

Hmm. The Litroenergy sounds a little too good to be true to me. Maybe I'm just a cynical git but my first thought was, "not another perpetual motion machine"...

Having said that, I would love it to be true.

The Litroenergy source is a radioactive tritium light source, as used on some watches.

The 12 year half life is a dead giveaway.