Having a dusk-till-dawn light at your home’s entrance can make you feel safer after dark.
You could install a new light-sensitive fixture or install a switch on an existing fixture. But, the easiest and least expensive fix is simply changing the light bulb.
Feit Electric makes an LED bulb with a photocell light sensor that turns the bulb on at night and off during the day. It has a twistable base to adjust the built-in automatic on/off sensor.
It is available at The Home Depot.