When to change bulbs?

Pekkle99 · 02/19/2006, 07:57 PM

How often am I suppose to change MH bulbs? I've had these since October and they've been on for about 11 to 12 hours a day. Thanksss.

artful-dodger · 02/19/2006, 08:30 PM

General rule of thumb is about once a year for MH.

Since you ask about "these" in plural I'm assuming you have two. (That's a lot for a 29!) Try to change one every six months rather than both every 12. Once you get them on an offset rotation you won't have to worry about light falloff as they age or burning corals after changing to newer, brighter bulbs.

02/19/2006, 07:57 PM	#1
Pekkle99 Registered Member Join Date: Apr 2005 Location: NYC Posts: 161	When to change bulbs? How often am I suppose to change MH bulbs? I've had these since October and they've been on for about 11 to 12 hours a day. Thanksss.

02/19/2006, 08:30 PM	#2
artful-dodger Registered Member Join Date: May 2004 Location: Highlands Ranch, Colorado Posts: 3,011	General rule of thumb is about once a year for MH. Since you ask about "these" in plural I'm assuming you have two. (That's a lot for a 29!) Try to change one every six months rather than both every 12. Once you get them on an offset rotation you won't have to worry about light falloff as they age or burning corals after changing to newer, brighter bulbs. __________________ "In matters of style, swim with the current; in matters of principle, stand like a rock." -- Thomas Jefferson Current Tank Info: 140g RR Oceanic "Ultimate" mixed reef, 37g softies, 40g RBTA tank, 65g FOWLR, 40g breeder frag, and (of course) a 29g QT! ...next up is a 240g! (Gotta go to K-Mart and buy a life...)