the bulbs are not of great quality. The first pc
fixture I bought from them (65 watt 24 inch) worked fine but the bulb blew after 20 minutes of use. I now replace all bulbs as quickly as I can and keep theirs as spares if something goes wrong or I want to test a retrofit. I haven't had a problem with their fixtures though except for the legs. They were all but useless on my 48 inch fixture.
As a side note, I don't like the three switches to control all 3 banks of lights (including the moonlights) because they are all on one plug. Cant use a timer if you want to stagger the lights.