There was a question about this earlier, but I didn't have the info at
the time.  One good source for small, high efficiency electroluminescent
backlights is:

BKL:  610 277 2910   fax 2956

fiber optic backlighting products from:

Lumitex

--

Paul Mathews, consulting engineer
AEngineering Co.
optoeng@whidbey.com
non-contact sensing and optoelectronics specialists