You can pretty much use any light timer from home depot, lowes, etc. Just make sure that they accept grounded plugs. Your heater should most likely not be on a timer but put your moonlights and your MH light on separate timers, thats what I did on my 24g NanoCube, granted its not the HQI but I changed the lights to a Sunpod which has seperate plugs for each light. Let me know if that answered your question. Good luck!