SunLight 10L-24V Charge Controller The MorningStar SunLight controllers combine the features of the SunSaver controllers (including LVD) with an adjustable automatic lighting control circuit. This allows you to connect a DC light and have it come on at dusk for a set period of time or dusk-to-dawn. It's 10 position rotary switch lets you choose exactly how your DC light will operate. Low voltage disconnect and sunrise override the lighting timer. It even includes a test button so you can turn the lights on during the day or for a short period of time (3 minutes) after LVD has occurred. Morningstars advanced SunLight solar lighting controller combines the SunSaver design with a microcontroller for automatic lighting control functions. This Technology Provides: Precise Lighting Control PWM Battery Charging Operation: Rotary digital switch to select among 10 lighting options (see back) Test button flashes red LED to confirm correct rotary switch selection Test button turns lights on for 5 minutes (in LVD limited to 3 times) LVD overrides lighting timer Sunrise overrides lighting timer Timer accuracy is within 2 seconds Dimensions: 6.6" x 2.2" x 1.3" Weight: 9 oz.