D.C. Mun. Regs. tit. 25, r. 25-F601
All rooms of a tanning facility shall have at least one (1) electrical source of light. Lighting luminaries and fixtures may be of incandescent, fluorescent, high density discharge, or light emitting dial (LED) types.
At least fifty (50) foot-candles of light shall be provided in each area and the laundry area.
At least twenty (20) foot-candles of light shall be provided in each restroom, locker room, toilet room, or other areas when fully illuminated for cleaning.
An average illumination value of ten (10) foot-candles of light, but never less than seven and a half (7.5) foot-candles of light, shall be provided in other areas within a tanning facility, including tanning rooms, offices, lobbies, retail shops, and waiting areas.
The above illumination levels shall be attainable at all times while the tanning facility is occupied, except as specified in Section 601.6.
Lighting may be dimmed during a tanning session so long as there is enough light to safely see or to leave the room in case of an emergency.
No tanning facility shall be equipped with tinted windows or two-way mirrors in any room therein.
No tanning facility shall be equipped with any electronic, mechanical, or artificial device used or capable of being used for recording either audio or video activities, conversations, or other sounds in tanning rooms or any other room used by customers.
D.C. Mun. Regs. tit. 25, r. 25-F601