The future for lighting is in LEDs. They have very long life, 50,000+ hours of life (over 11 years), extreme low power (high efficiency) and will drop in price in the coming years. There is no issue of contamination like the existing florescent lights.
Here's a link to producs, direct replacements for existing bulbs, also 12V products that is of interest to an off grid system:
http://www.earthled.com/distributors.html