My personal favourite are UVL bulbs. The optional internal built-in reflectors are really cool. I think you can get each bulb with or without reflector, so look closely.
The Hagen 18,000K that you are currently using is a good bulb too, but usually over-priced. KZ are really good bulbs, but the priciest of the lot. Many people rave over AquaScience, but I have not been a happy customer (see below).
Quote:
Originally Posted by fishytime
Aquascience being my personal favorite....
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Really Doug? I have been very disappointed with the AS 22,000K and the 15,000K with
really bad color fade in only a few months.