have been following this thread with much interest. have gone through four clip-on lights and two LED-type 'table lamps' for my Sony Reader. none worked fine.
my current solution looks dorky and you might rotfl, but hey, it work wonderfully well.
it is a 19-LED headlamp, and if you angle it slightly off-center, it lights up the screen beautifully and there is no glare. It works on 3 AAAs. I am using rechargeables, and they seem to last for days of moderate reading. Will do a more precise measurement later. Will also post some pictures if you want.
I bought them off ebay, but you can google for more links
http://www.google.com/search?hl=en&q=19+led+headlamp
image here:
