3.13 photoluminescent lighting (PL) system
an LLL system having materials of which contain chemicals, such as zinc sulphide or strontium aluminate, that give it the ability to store energy when illuminated by light. The PL material emits light which becomes visible when the ambient light source is less effective. Without sufficient ambient light to charge or reenergize the material, the emitted light diminishes over a period of time until it is ineffective.
3.14 signs
posted information used in conjunction with LLL systems indicating the routes of escape or direction to the assembly station.
3.15 technical product documentation
a comprehensive document of content and detail necessary for technical purposes.
3.16 visible delineation
portrayal of the escape route by a series of contiguous strips or indicators that can be clearly seen during egress.
4 Approval of LLL systems
4.1 General
4.1.1 The Competent Authority shall ensure that LLL systems and their components meet the requirements set out in this standard, as verified through the presentation of relevant certificates issued by recognized laboratories.
4.1.2 Combinations of PL and EP systems may be permitted. However, only one system shall be applied for each deck or stairway enclosure unless the deck or stairway enclosure is separated by normally closed doors. In addition, signs and markings made of PL materials may be used with EP systems.
4.1.3 The supplementary emergency lighting for ro-ro passenger ships required by Regulation II-1/42-1 of the 1974 SOLAS Convention, as amended, may be accepted to form partly or wholly the LLL system, provided that such a system complies with the requirements of this standard.
4.1.4 Interruption of the LLL system due to constructional practicalities (corridors, cabin doom, etc.) shall not exceed two meters.
4.1.5 The LLL system shall function at all times for at least 60 minutes after its activation.
4.1.6 LLL products shall not contain radioactive materials or release toxic materials under normal conditions.
4.2 Photoluminescent systems
4.2.1 Except where noted, PL strips should have a width of 75 mm or greater. Photoluminescent strips having a width less than 75 mm shall only be used if the luminance is increased to compensate for the reduced width in accordance with the table contained in Annex E.
4.2.2 Photoluminescent materials shall provide at least 15 mcd/m2 measured 10 min after the removal of all external illuminating sources. The system shall continue to provide luminance values greater than 2 mcd/m2 for 60 minutes. The light level shall be measured at the surface of the materials. The minimum level of ambient light necessary to charge the PL material to meet the required luminance values and the spectrum emission of the light adopted during the test contained in Annexes A through C, shall be verified and recorded.
4.2.3 PL materials shall be flame retardant materials in accordance with IEC 92-101.
4.2.4 PL materials shall be tested in accordance with Annex A.
