26 Tex. Admin. Code § 554.320
Current recommendations of the Illumination Engineering Society of North America must be followed to achieve proper illumination characteristics and lighting levels throughout the facility. Minimum illumination must be ten foot candles in resident rooms and 20 foot candles in corridors, nurses stations, dining rooms, lobbies, toilets, bathing facilities, laundries, stairways, and elevators. Illumination requirements for these areas apply to lighting throughout the space and should be measured at approximately 30 inches above the floor anywhere in the room. Minimum illumination for overbed reading lamps, medication preparation or storage areas, kitchens, and nurse's station desks must be 50 foot candles. Illumination requirements for these areas apply to the task performed and should be measured on the task.
26 Tex. Admin. Code § 554.320