Incandescent version may only be mounted vertically; compact fluorescent version may be mounted vertically or horizontally . Includes 120 volt, 60 watt or equivalent medium base BT15 halogen lamp, 13 watt 2GX7 base twin tube compact fluorescent lamp (electronic ballast included) or 10 watt, 600 lumen, 2700K LED module. Incandescent version dimmable with standard incandescent dimmer. LED version dimmable with low-voltage electronic dimmer. ADA compliant.