The Intermatic Heavy Duty HB-112 240 volt 15 amp timer is very good for lighting, air conditioning or other high amperage devices. It has 4 trippers that you can place for up to 2 on/off times per day and a manual override to allow you to turn it on or off without changing the current timing. It has a 30 minute resolution. The HB-112 will control up to three 1000 watt lights. It has an industry standard NEMA 6-15 plug configuration.