I replaced the dusk to dawn light on a garage. After taking down the old one and installing the new one, the light blinked once, which is what the directions said it would do. It didn't turn on at dark like it was suppose to. I tried to switch the wires to see if maybe I hooked it up wrong. Still doesn't work at night. The sensor on top has an arrow on it which I have pointed north. The brand name of the light is Regent.There is power going to the light. Is there a way to check it in the daytime? Any help is appreciated.