This is a good unit, well made and durable. There are two small issues. In common with a lot of light sensor devices, there is no internal timer. This means, depending on the position, headlights sweeping across the face of the sensor is sufficient to trick the device into thinking that its dawn . Backing out of the driveway in the morning, i can watch the lights pop on again as that brief interlude of artificial daylight triggers the dusk function. It needs to have an internal timer that would require x amount time of light on the sensor before starting dawn mode. The second small thing, the manual setting. It would be great if pressing the hour settings would turn that lights on and then turn them off x amount of hours later without having the be concerned about the sensor. So manual mode but allow an timed turnoff rather than having to also manually turn them off again. Otherwise a solid product.