Reefaddict
Aquarium Advice Freak
Im looking for good MH bulbs for my 55 gal. I have seen Ushio, XM, Radium, German, and Corallife offered on many web sites. How do you know which ones to get? What do some of you guys use for MH? I've heard that Radium work great, but lose light intensity pretty fast, causing much fluctuation in light, and you have to replace them very often, like every 4 to 6 months....Yikes... Is there a bulb type that seems to be the best or is it all pretty much opinion?