Bulb operates on 3 volts DC power. It has the standard screw in base. The glass has a carbon look to it to give it a true vintage look. The light is a slight yellow color. Gives off about 25 watts of light as an incandescent bulb. Low voltage only. Thanks for looking! CAUTION: do not screw this bulb in a 120v/220v regulator lamp socket that is plugged in your house electrical. The bulb will blow out and be ruined.