I have the 24" SunPod and I love it. I've been using it for about a month. One thing to note is that if the power dips off momentarily, the unit won't come back on automatically. You need to shut it off for a few minutes, then turn it back on. It's probably for protection of the bulb or ballast. I'm using the unit with the 14K 150W bulb that came with it. I may switch to a 15K XM bulb when the time comes.