I have dusk to dawn lights on either side of my garage door. I noticed a few days ago that they have been on non-stop, sunny days and all. Do I need a new photocell? Any suggestions?
That will probably be the cause. Still you can try to switch off the breaker in the circuit for those lights and switch it back on, maybe wait some time in between. That might reset the photocell.
And clean the photocell if you haven't.