The promenade deck is a location found on almost all cruise vessels. It normally extends from bow to stern on both sides and includes areas open to the outside, resulting in a continuous outside walkway suitable for walking or jogging. Usually, the promenade deck is the embarkation deck to man the lifeboats in emergency situations.
As with all areas on-board a cruise vessel, the promenade deck has special requirements for installed lighting equipment, regardless of whether the area is for work, embarkation, rescue or winching. In addition, the visibility of the vessel itself and its surroundings also have to be considered. The required lighting solution must operate in all weather conditions. A good lighting solution will also provide a safe working environment for the crew.
Different areas on the ship require special demands for lighting
As well as achieving a reliable and evenly distributed light output, it is also important for promenade deck areas to provide the correct light colours, light intensity and robust, stable light fixtures for long term reliability. Using the appropriate fixture material for the application is critical in order to ensure high robustness and a long operating life of the light fitting, resulting in minimal or zero downtime.
Important factors when working with lighting solutions for promenade decks:
- IP rating.
- Mechanical strength/impact resistance.
- Low maintenance and reduced power consumption (high energy efficiency).
- Light quality.
- Light colour setting.
The highest priority is the IP rating of the light fittings. The challenge here is not only in protecting the fixtures from rain and water spray, but also from the continuous impact forces from waves in rough seas, which means an IP68 rating is required. In addition, the light fixtures must also withstand intensive cleaning using brushes, chemicals, other tools and sometimes high-pressure cleaners.
Using the correct combination of materials in the luminaire is important in order to ensure robustness and a long operating life. Materials are specially selected to withstand high shocks and vibrations. Especially for areas where heavy vibrations occur, the use of LED light fittings is recommended. LED lighting withstands shock and vibration due to the design of the diodes. No additional vibration suspension is required. The ability to operate across a wide range of ambient temperatures is also an important requirement on the lighting. Cruise vessels must be able to navigate around the world. Ideally, the light output and light quality should be consistent across all temperature bands.
Low maintenance and reduced power consumption
Easy installation and various mounting options ensure flexibility, time saving and increases safety for crew members, primarily because some of the lights are placed in areas with difficult access. The luminaires should consume as little energy as possible to be able to reduce the size of power generators and to save energy and reduce pollution. The efficiency and life span of LEDs continue to improve, and LED luminaires are virtually maintenance-free. This means that cruise vessels with LED lighting will have lower operating costs than vessels with conventional luminaires. In addition, the reduced power consumption of LED lighting onboard has a positive impact on the cruise vessel’s Air Conditioning system, as less heat is emitted from the lighting, which means less AC power is needed and fuel consumption is reduced. The initial investment of the LED installation may be higher than that of a traditional lighting installation, but the reduced energy consumption and maintenance costs of LED lighting means that the difference in price is quickly paid off.
In promenade deck areas, the light output quality is important for visual perception and to enable passengers and crew to see details and colours. The colour-rendering index (CRI) should be above 80 to enable colours to be differentiated and to allow real colours to be recognised. According to the different marine standards, the lux level required on a promenade deck will vary depending on the particular application. To avoid shadowing and to reduce glare (UGR), a proper light calculation will need to be carried out and luminaires with homogeneous light distribution should be used.
Light colour setting
In promenade deck areas, the light colour setting is important in order to create the desired ambience using RGB direct or indirect luminaires and LMS controls.
All lighting products for promenade deck areas should be designed in accordance with marine standards and regulations.