lighting question

[letysjim]

how often should you replace blue actinic blubs

[DeLong20]

If they are PC's I say every 8-12 months. The sooner the better IMO.

All bulbs should be replaced every year.

[fish2]

i try and replace bulbs every 6- to- 8 months so that i dont get to much of the red band, which can lead to bacteria out breaks