Vickerman 35 Light LED Battery Operated Multi-color Wide Angle Christmas Light set featuring Green Wire, (Red/Green/Blue/Amber/Purple/Pink/Warm White) 24 gauge Wire, 12" Lead, 5" Spacing, Multi Functon Battery Box W/Timer (4/6/8Hrs On) And Photo Sensor Press Button which means the lights will turn on at dusk and turn off at dawn. Requires 2 C Batteries (Battery's Not included) Using 4hrs on; 20hrs off timer - good quality battery life is expected to last for up to 25 days Using 6hrs on; 18hrs off timer - good quality battery life is expected to last for up to 20 days- Using 8hrs on; 16hrs off timer- good quality battery life is expected to last up to 18 days In Door Use Only