How often should you change your bulbs?

[KrazyKuch]

Originally Posted by fishoholic

Our T5 bulbs had to be replaced after 8 months, we noticed our corals started to shrink and look bad, after we replaced the bulbs all our corals went back to normal.

so then all in all the only difference between T-5's and metal halide is the tempurature....Why do people bother going with T-5's then if MH last longer and are cheaper!!