Station lighting shall be designed for sufficient levels of illumination for the various areas. The following illumination levels (in foot-candles) are recommended:

Lighting fixtures shall be located so as to facilitate relamping and maintenance.

Lighting fixtures in the wetwell shall be explosion-proof (listed as a minimum for use in Class I, Division 2, Group D locations) and corrosion resistant compact fluorescent with cast aluminum alloy housing, clear globe and guard. Separate light switches with pilot lights for the wetwell and the vault shall be located in the control cabinet.

Lighting fixtures in the valve vault shall be corrosion resistant enclosed and gasketed compact fluorescents with clear globe and guard.

Exterior lighting fixtures shall be high pressure sodium, waterproof, vandal resistant and mounted on poles. Switch shall be located in the control cabinet.

A strobe light fixture which is wall-mounted in the wetwell shall be acceptable for use in Class I, Division 2, Group D locations. The strobe light fixture shall be incandescent and housed in a red lens with a protective guard. The strobe light is to be activated by the air analyzer when hazardous gas/air alarm limits are attained and detected. (Design Guideline DG-08 § 14.0, dated August 2006)