Yeah, that's not really going to work well as supplemental lighting.The light is light sensitive so it comes on when its "dark enough" and turns off when it runs out of charge so i estimated about 6-9pm but it could be a little earlier. So, im not sure i would call it a feature but its basically a built in timer i guess. The birds always come out of the house as soon as the sun comes up and when the coop light comes on they go inside right away so theyre in the light from about 630am to 9pm at night.
Consistent duration and brightness of light is important.