How often to replace light lamp

[shifty51008]

As you said I don't need to replace effect light blue and purple correct so all I need to replace are daylights lamp correct

Because your useing t5's you will want to change all your bulbs. I wasnt sure what type of lights you had so i was just guessing. Some people run seperate bulbs just for their dusk/dawn effect. For your t5 setup all 4 bulbs are gonna contribute to your daylight even if you have seperate switches to turn of your white bulbs

 

[Bpb]

My goodness. Of course people you've got to change your blue bulbs. Those are your growth bulbs. You don't see corals with massive photosynthetic absorption peaks in the yellow green and red ends. It's mostly in the blue and violet. This range shifts faster than any other with bulb age. Replace all bulbs every 10-12 months. Space out each bulb swap by a week. As in one day replace the first bulb, a week later replace the next...so on. To avoid photo shock to corals and having to mess with your photoperiod. If you don't have corals then don't even both with it. Just keep them till they burn out.

For 4 bulbs get on marine depot and order yourself 2x ATI Blue+ 54 watt bulbs, and 2x ATI Coral+ 54 watt bulbs. Stagger them blue white blue white

 

[hoangtin18]

My goodness. Of course people you've got to change your blue bulbs. Those are your growth bulbs. You don't see corals with massive photosynthetic absorption peaks in the yellow green and red ends. It's mostly in the blue and violet. This range shifts faster than any other with bulb age. Replace all bulbs every 10-12 months. Space out each bulb swap by a week. As in one day replace the first bulb, a week later replace the next...so on. To avoid photo shock to corals and having to mess with your photoperiod. If you don't have corals then don't even both with it. Just keep them till they burn out.

For 4 bulbs get on marine depot and order yourself 2x ATI Blue+ 54 watt bulbs, and 2x ATI Coral+ 54 watt bulbs. Stagger them blue white blue white

Do you need purple bulb?

 

[hoangtin18]

Look like there a lot of money changing all bulbs every year . I already bought 4 aquatic life bulbs. Maybe next year I will upgrade my light fixture with LED light. Anyone know any LED fixture work good for 90gal tank with good price