Know the difference between a Vita Lite and a Chroma 50 ? About $15. The difference is so small it's unmeasurable. At least that's what I've been told. I'd love to hear you're actually getting something for all that extra money, but it sounds like a dimished return to me. -- Richard J. Sexton richard at aquaria_net Maitland House, Bannockburn, Ontario, Canada, K0K 1Y0 +1 (613) 473 1719