How often should you change your bulbs?

[Myka]

Originally Posted by KrazyKuch

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!!

Depends what you want. Some people don't want to spend $700+ on a chiller, so they opt for T5. Some people only want to keep LPS or softies, which do great under T5. Some people like the bulb combinations you can get going. Lots of reasons...