"AC/DCdude17" wrote in message
...
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pyrite wrote:

I dont have anything as of yet on the 90 gallon but I was gonna get
those
cheapy 7.29 fixtures from home depot...

They work. With a four foot four tube standard t-12 fixture you would
have 160 watts over the 90g tank. This is about 1.8 wpg, plenty of light
for many of the less fussy plant species but not enough to require you
use co2.

Actually, your math is too optimistic. Avoid Lights of America shop
light. They
have a mediocre ballast that tears up your expensive bulbs REAL fast.

Different brands of cheapo shoplights are to be avoided as well. They
only
operate the lamps at 50-70% the power. If you get a fixture with
commercial grade
ballast, it will give out 95% output and full lamp life even though the
fixture is
more expensive. You can tell a commercial grade ballast from residental
grade by
its length. Commercial grade is ~10", residential grade is about 2"
shorter.





Good to know. I may be able to score some commercial ballasts from an
electrical supply store. I will look in to it. Thanks.


~Mort