I have read a post from someone on here about a response they received from coralife about this question. It stated that the bulbs should be replaced between 9 and 10 months of use. Of course your photo period has a great inpact on this time. I know from growing aquatic plants, that letting the bulbs go for too long will only lead to disaster!
Replace the bulbs a little early and waste a couple bucks or waste all the time to clean up your tank and remove dead corals? I guess that's a quesiton that everyone has to answer.
I'll see if I can dig up the post.
EdIT: This post was in relation to planted tanks, but will suffice for corals as well. Shifting of the spectrum is a bigger worry then losing PAR in a planted tank. I have no idea how that would effect corals.
Originally Posted by evercl92
I've seen this question asked several times, and also seen various answers. So, I went ahead and emailed Coralife to find out when the bulbs should be replaced. Here's what I recieved:
It actually depends on the plant species. You can go as long as 16 months for some species, and as little as 6 months for more sensitive species. On average if you change them out every 8 to 10 months you will be good.
Product Lines Tech. Support Dpt.
@Innovator: Are you telling me that going for 5 years on the same bulbs would still allow all the corals to live. I wouldn't think so. My post was an extreme and nothing more. Corals can and will die if not provided enough light. The point was, and remains, that IMO
I would rather change the bulbs then possibly
lose some of my corals.