21. An outdoor pool used after sundown or an indoor pool shall have: (a) a lighting system which illuminates the underwater areas of the pool and also illuminates all parts of the deck and water surface with an illumination level at least:
i. 30 decalux for an indoor pool; and
ii. 10 decalux for an outdoor pool;
(b) in case of failure of the electric power necessary for the lighting, an emergency lighting system insured by a generator or a recharging battery with automatic relays to illuminate the bottom of the pool, the deck and the undressing room. Any installation after 21 November 1979 shall conform to the CSA standard (C22.2 No. 141-1972) Unit Equipment for Emergency Lighting.