Every passenger ship is required to have a low location lighting system in place. This is in accordance with SOLAS, Chapter II-2, Regulation 22.214.171.124.1 to 126.96.36.199.2 and Chapter II-1, Regulation 42 and 42-1. In short, these regulations state that both passenger and, when appropriate, crew areas should be constantly lit by floor path lighting. This means that anywhere on a ship where passengers and crew might have cause to go, there must be constant lighting along the floor. IMO Resolution A.752 (18) and ISO 15370 govern the proper installation, evaluation, and testing of low location lighting on ships. According to current standards, either electrical or photoluminescent lighting is acceptable.
In areas that are restricted to the crew, most ship lines prefer to use photoluminescent lighting. Photoluminescent strips are easier to install, less expensive, and more reliable than their electric counterparts. Photoluminescent tape can be cut and applied in a matter of minutes, providing reliable emergency lighting if and when the lights go out. Tested to remain illuminated in excess of 60 minutes, photoluminescent strips provide consistent lighting for an ample amount of time during emergency situations at sea.