when to replace bulbs

[m50177]

i have 2 150 watt coralife lights with 7 month old 14000 k bulbs is it time to replace or do i have some time thanks

 

[reefnetworth]

i replace mine about every 6 months or so. when your colors fade out or dont seem as bright. some more expensive bulbs have disclaimers of 10,000 hours, which is roughly a year. But, that depends on your photoperiod/hrs used per day. hope that helps, have a great day!
JDM