These bulbs are connected to a 120volt 15 amp circuit and they come at dust and go off at dawn.

They are 250 volt rough service bulbs and they emit about 50 watts each. They were installed for security purposes and are very high in the barn therefore they need to be dependable or the camera will not work very well.

Most bulbs are rated at 120 volts; I buy 130 volt bulbs from the supply house that last a real long time.