Incandescent includes 120 volt 40 watt or equivalent medium base Classic Edison Style lamp; fluorescent includes 18 watt GX24Q-2 base, triple tube lamp and electronic ballast. LED version includes 3.5 watt, 250 delivered lumen, 2200K LED lamp. Incandescent version dimmable with standard incandescent dimmer. LED version dimmable with an LED compatible dimmer. Consult lamp manufacturer for more information. Suitable for damp locations.