I'll give you this - Coralife has excellent customer service. I ordered a new 30" T5 light fixture and it sat for a few weeks while I finished building the tank stand. When I finally set everything up, I discovered that the 6700K bulb was not working. I e-mailed their customer service and while it took them a few days to get back to me, they responded asking for my shipping address to send me a new bulb free of charge! The rep almost instantly responded to the few questions that I e-mailed him, and the bulb is already shipped and on its way.