How often should I change my lighting??

[adman76]

Hi!
I have been running my tanks for 10 hours daily for four months now. Recently have been noticing a decline in plant bubbling. Could it be the light? How often should I change the lights? I am using four 36 watt PL lights.
Thanks!

[Simon]

for PL, it should be around 6months, depending on brands..

for guide

FL - 3months
PL - 6 months
MH - 2 years

[chquan85]

so after changing the bulbs... if they are still workable juz discard them?

[Sleepy_lancs]

use them at home.. lol

[vinz]

For me,
FL - 6 months
PL - 1 yr

Change your lights at intervals, not all together, so that you don't go from dim to very bright suddenly.

E.g. If you have 3 PLs, change 1 tube every 4 months. Or if you have 4, then 1 tube every 3 months or 2 tubes every 6 months.