The LUMii 24 Hour Plug In Timer is ideal for setting day and night on/off lighting period as well as setting a heater on periods and timing irrigation cycles. It is reliable and has a high quality timer unit. This timer has been designed to take a 13 amp plug so there is no need to remove the plug to reset the controls. There are 96 switching operations within a 24 hour period (every 15 minutes). It is ideal for setting on and off (day and night) periods with CFL and T5 as well as LED grow lights and timing pumps for irrigation cycles.