I just wanted to give a short update. The xenia is still doing fine. I did notice that it doesn't pulse during the day when the MH's are on. Once they shut off and just the living room lights are on it starts to pulse again. It's not melting away, so that's better than any I've had before. I'm going to be changing my canopy tomorrow to make room for the new VHO's. More on that in the lighting forum.