Low Location Lighting System
WHAT IS PL LLL:
Photoluminescent or Phosphorescent (PL) Low Location Lighting (L.L.L.) System
An LLL system which uses PL material. PL material contains a chemical that has the ability to store energy when illuminated by visible light. The PL material emits light which becomes visible when the ambient light source is less effective. Without the light source to re-energize it, the PL material gives off the stored energy for a period of time with diminishing luminance.
USAGE of LLL:
According to 4.7 of the 1974 SOLAS Convention, as amended, LLL system is required on all passenger ships carrying more than 36 passengers, to readily identify the passengers’ route of escape when the normal emergency lighting is less effective due to smoke.
DAY VIEW of LLL
NIGHT VIEW of LLL
At DAY following the IMO Signs & Posters you can navigate through the vessel.
At NIGHT or in a dangerous situation you can easily find your way out.
ISO 15370:
4.1.3 The LLL system consists of the following components: the guidance lines at low-location, the marking of exit doors, and the signs at low-location relevant to escape routes and fire-fighting equipment.
4.2.1 Phosphorescent (PL) materials shall provide a luminance of at least 15mcd/m2 measured 10 min after the removal of all external illuminating sources. The system shall continue to provide luminance values greater than 2mcd/m2 for 60 min (for 75mm tape width).
4.2.5 PL materials shall be flame-retardant in accordance with ISO 3795 with the contact of 38 mm flame for 15 s and classified as F1.
IMO resolution A.752(18)
4.2 In all passageways, the LLL should be continuous except as interrupted by corridors and cabin doors in order to provide a visible delineation along the escape route. Systems tested to an international standard to demonstrate a visible delineation without being continuous should also be acceptable. The LLL should be installed at least on one side of the corridor, either on the bulkhead within 300 mm of the deck, or on the deck within 150 mm of the bulkhead. In corridors more than two meters wide, LLL should be installed on both sides.
4.6 In all passengers’ cabins a placard explaining the LLL system should be installed on the inside of the cabin door. It should also have a diagram showing the location of, and the way to, the two closest exits with respect to the cabin.
5.1 LLL should lead to the exit door handle. To prevent confusion, no other doors should be similarly marked.
5.2 Sliding fire doors and watertight doors should be marked with an LLL sign showing how the door opens.
Exit doors which are part of the escape route from the approved escape plan shall be marked with the LLL arrangement.
Exit doors that can be used in both directions in the escape route shall be marked by the LLL system on both sides.
ISSOFOS LLL products and installation are compliant with ISO 15370:2021, IMO A.752(18), ISO 7010 and DIN 67510.
Our expert Team can provide the entire LLL System.
Study of Vessel’s Plan, Inspection, Installation, Luminance Measurment & 5years Certification.
YAH (You Are Here) & YC (Your Cabin) Signs
Photomeasurement of the LLL System
IMO resolution A.752(18) & ISO 15370:2021 – Maintenance
1. All LLL systems should be visually examined and checked at least once a week and a record kept. All missing, damaged, or inoperable LLL should be replaced.
2 All LLL systems should have their luminance tested and certified at least once every five years. Readings should be taken on site. If the luminance for a particular reading does not meet the requirement of guidelines, readings should be taken in at least ten locations equally spaced apart in the space. If more than 30% of the readings do not meet the requirements of these guidelines, the LLL should be replaced. If between 20% and 30% of the readings do not meet the requirements of guidelines, the LLL should be checked again in one year or may be replaced