T5 lights replacement

[masonicman]

How often are you suppose to change the T5 bulbs?

 

[moondoggy4]

I am chaining mine every 12 months. I stagger my purchase every 6 months to offset the price, lucky for me I got in 2 group buys.

 

[jimmy frag]

t5s

t5s

i have a 5 lamp sun tek and swap out 1 every 6 weeks