changing bulbs


New member
1. How often should I change T5s if running about 10 hrs. a day?
2. Just what happens when t5 florescent bulbs get older? Does the spectrum change or just the amt. of light output?
3. I use 2 - 6500K shop flood lamps on my fuge. How often should they be changed?
4. I have some shrooms and a Kenya tree coral - the rest of my tank is macro algae - could someone give me an idea of what configuration of bulbs (6 - T5s) would be best?
Thanks for all your help.
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