The Deluxe Exhaust Fan with Light provides 100 CFM of ventilation at a sound level of 2.5 Sones. The 4" duct collar with plastic damper protects against back drafts and ensures quiet operation. It installs easily using the included adjustable hanging brackets. The exhaust fan, light and 7-watt nightlight (bulb not included) can all be wired to operate separately. Provides up to 100 watts of lighting with a standard incandescent light bulb (not included). The moonstone glass light lens disperses the light evenly throughout the room.