How long do the batteries last?

The Wall Sconces use 4 C Cell batteries. The battery life will vary depending on how often the motion sensor activates the light. Most people get about a year from a set of batteries. I have used the Wall Sconces to light a walkway on the side of my house and the batteries lasted for more than 2 years. The LEDs provide 100 lumens of light and the light stays on for 30 seconds when the motion sensor is triggered. Skip West - MAXSA Innovations .