How often should I replace my flurecent bulbs?

[wildcats]

Hi there! I have never changed my bulbs yet. It's now been approx. 1 year since i first set up my tank. I only have two 36inch flurencent bulbs. When do I replace them? Can anybody help!! Maybe it's time to upgrade my light setup. I would appreciate any suggestions. Thankx
Wildcat

 

[tangman99]

It is time for new lights based on average use.
Tangman

 

[wastedincome420]

I'm far from being a Pro on this issue but from what I have learned most reccomend replacing the bulbs once a year. Hope this can help
Wastedincome420@aol.com

 

[b_ball12_99]

Welcome to the board. I've read to change them every year and I've read to change them every 6 months. Really depends on what kind of light you have.