Adequate illumination shall be provided throughout the cells and day rooms. An illumination level of 20 foot candles shall be provided at mirrors and tables. Inmates should be capable of controlling some lighting; override capability shall be provided. Night lights sufficient to permit continuous observation shall be provided. Control areas and means of egress shall be continuously illuminated. Exteriors of buildings and all entrances shall be lighted sufficiently to observe approaching persons.
37 Tex. Admin. Code § 261.356