I have SL 37's from Custom SeaLife. Although the daylight and actinic bulbs/sockets have separate power sources, they malfunction when rigged to separate timers. Either both lights will stay on or both off, they can not be run separately. Although I beleive this is due to improper wiring by the manufacturer,(The ballasts are not grounded) I am reluctant to change the wiring. CSL wants to send me a replacement, but if this is how they wire all of their ballasts, I do not think this will be a remedy. Has anyone had this problem? I am using Analog timers from Intermatic, and have mucho experience with electronics.