I got the CSL 4x65W PC/moonlite about a week ago. It's built really nicely (very sturdy, easy to assemble, sleek design). The light looks great in the tank, a nice balance between the daylight and actinic spectrums. The fan is a little noisy, but easily tolerable. The moonlights, while whiter than most, shimmer beautifully. There is however no easy way to get to the moonlights for maintenance that I could find in the instructions. I'd expect they'd have a long life, but who knows. Also, I'm just starting my cycle, so it will be a while before I can judge what really matters - how well things grow under these lights.