Lighting Question

[armydad]

How often should you change t-5 bulbs. The light we have is a 2yr old Nova 4 bulb fixture and I know the bulbs were changed once, because I have the old ones still. The lights are on 6-7 hrs a day is all

 

[rcreations]

Is this a reef tank or fish only? If it's a reef, you should change the bulbs every year or 16 months. If it's fish only, you don't need to worry about it.

 

[armydad]

Fish Only

 

[mr. limpid]

I have PC and they are going on three years. The only prob. is that old bulbs cause cyno bactira growth, i just only turn on lights when I'm home to keep the growth down.