I uploaded the TimeSet code.....Worked perfectly. I also uploaded the TankControl code again after lowering the minimum PWM state to "5" and stting the fade duration to 1 hour. All I can say is "WOW!" The dimming is completely linear, seamless, and totally natural looking. That has got to be the best Dimming Simulation that I've ever seen! I now have 90 little "moon lights" over my tank. Too cool! Thanks so much for creating and posting the codes!