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When using fiber optics for room lighting it is important to be observant of the utilisation grade and of the spread angle. Fiber optics is incomparable to traditional halogen lighting.
The following points should be observed:
• The spread angle (max. 60 degrees) requires that fiber ends are placed closer to the walls than
halogen spots with parabola, unless you use tiltable fittings.
• The fiber ends must be spread evenly in the ceiling.
• Overlapping increases the light level. The less distance between fiber ends, the higher the light level.
The distribution of light is very important. The walls should be illuminated in a reasonable height (1.9 – 2.3 metres above the floor, dependent on the height of the room.) The use of optical fittings will reduce the spread angle of the light. This means higher light intensity in a smaller area. The light intensity at the floor is increased, but the light hits the walls lower down, or not at all.
Fiber light should be installed close to the wall in order to light it.
Fiber light with optics. The walls may not be lit.
Overlapping of light increases light intensity by the number of overlaps.
Roblon lighting generators are among the most quiet generators on the market. Still, it is worth considering whether noise is a problem for the project you are planning. As a main rule, light generators for room lighting should have an on/off function. Therefore metal halide generators are only applicable for
installations where the light is on for a long period, for instance in lobbies, hallways, entrances etc. If electrical dimming is required, halogen generators must be applied.
The fitting is an elegant finish on the system; it can be delivered without optics, if the biggest possible spread is wanted, with optics if a higher light intensity at floor level is required, or tiltable for guiding the light onto the walls.
The light level can be adjusted in the following ways:
• Strength of light generator.
• Fittings with or without optics.
• Small or large distance between fiber ends.
• Small or large diameter of the fiber cable.
• Number of fiber light systems in the room.
The total light efficiency from the system is the same whether many small or a few thicker fiber cables are applied – as long as the poly connector is 100% filled with fiber cables. It is important to remember that a room appears light if the walls are lit!
Many or a few light points? With or without fittings/optics?
When fiber light is dimensioned for room lighting, the following rules should be remembered:
• At least 6-7 times as many light outlets are needed as by traditional parabola halogen spots.
• A combination of the system is possible: some of the fiber cables are finished with light fittings without
optics, while others have fittings with strong optics, if certain areas of the room should be extra lit.
• Finally, some of the fiber cables in a fiber harness can be of larger dimensions than the rest.