 Re: metal halide bulbs
The SunPaq are the best PC bulbs available. As far as MH - XM, Ushio, Aqualine AB, and Hamilton are amongst my favorites. I'm not a big fan of Coralife bulbs. Color choice should be based upon user preference, but remember that too high of k-value and your par values go down. If you don't know much about lighting, low k-value bulbs are more yellow, 10k is white, and 15+k is more blue.
BTW - You probably don't want to switch out all of your bulbs as once or the corals might not like the sudden change. Light bulbs loose some intensity over time. Swap out either the PC or MH bulbs and switch the other bulbs out a couple weeks later.
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Current Tanks: 220 Gal Reef, 10 Gal FW, 6 Gal FW
Last edited by pogodzib; 12-10-2007 at 05:43 PM.
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