53 Pa. Stat. § 24967
Every portion of the building devoted to the uses or accommodation of the public, also all outlets leading to the streets and including the open courts and corridors, shall be well and properly lighted during every performance, and the same shall remain lighted until the entire audience has left the premises. At least two or more oil lamps on each side of the auditorium in each tier shall be provided on fixed brackets not less than seven feet above the floor. Said lamps shall be filled with whale or lard oil and shall be kept lighted during each performance, or in place of said lamps candles shall be provided. All gas or electric lights in the halls, corridors, lobby or any other part of the said buildings used by the audience, except the auditorium, must be controlled by a separate shut-off located in the lobby and controlled only in that particular place. Gas mains supplying the building shall have independent connections for the auditorium and the stage, and provision shall be made for shutting off the gas from outside of the building. When interior gaslights are not lighted by electricity, other suitable appliances, to be approved by the said bureau, shall be provided. All suspended or bracket lights surrounded by glass in the auditorium or in any part of the building devoted to the public shall be provided with proper wire netting underneath. No gas or electric light shall be inserted in the walls, woodwork, ceilings or in any part of the buildings unless protected by fire-proof materials. All lights in passages and corridors in said buildings, and wherever deemed necessary by the bureau of building inspection, shall be protected by proper wire network. The footlights, in addition to the wire network, shall be protected by a strong wire guard not less than two feet distant from said footlights, and the trough containing said footlights shall be formed of and surrounded by fireproof materials. All stage lights shall be incandescent electric lights, where the current can be obtained, and shall be constructed according to the best known methods and subject to the approval of the said bureau, and shall be suspended for ten feet by wire rope. All ducts or shafts used for conducting heated air from the main chandelier, or from any other light or lights, shall be constructed of metal and made double with air space between. All stage lights shall have strong metal wire guards or screens not less than ten inches in diameter, so constructed that any material in contact therewith shall be out of the reach of the flames of said stage lights and must be soldered to the fixtures in all cases.
53 P.S. § 24967