A shielded electric light, or lights, shall be provided for the direct illumination of the caboose desk. A ceiling or wall light, or lights, operable from separate switches shall be provided to otherwise illuminate the caboose interior. The area of the drinking water and lavatory facilities shall be illuminated. All cabooses constructed after the effective date of this act shall have toilets which are illuminated.
Okla. Stat. tit. 66, § 255