Mr. Limpet
Aquarium Advice Addict
I use timers, too. The tanks with the nighttime LEDs automatically switch between lights, LEDs, no LEDs (when I will be sleeping), then back to lights.
+1 on timers
Petco has a great one for $9.99 and it takes 3-prong plugs. Saves me the hassle of turning 4 tank lights on/off everyday.