Bending of Fiber: Do NOT bend the fiber at hard right angles. It is not recommended that you bend the fiber more than 8x the diameter. Yes, the fiber can be bent very, very sharply but doing this will result in a “lighting hot spot” and this will reduce the distance the fiber will illuminate. Remember, light travels in straight lines and does not respond well to bending. Generally, the slighter the bend, the better the light transmission within the fiber. When the fiber leaves the illuminator it should come out in a straight line for a few feet. Do not bend the fiber immediately; instead, allow the light to first have a short straight run.
Distance of Illumination: How far will a fiber illuminate? There is no simple answer to this question. The number of curves or bends in the fiber will affect the distance and the intensity of the light as it travels from one end of the fiber to other. The ambient light is critical. What is acceptable illumination around a dark pool may not be acceptable around a building that has an illuminated parking lot or is in a shopping mall. How bright a person expects the fiber to appear is also a factor in determining the distance of illumination for that particular fiber, illuminator, and situation. Brightness can be enhanced a bit by taking the flat side of the Hot Knife and melting the ends of the fibers together at the fixtures and then polishing it with a fine sandpaper or emery cloth.
Immersion in Liquids: Do NOT put the ends of the fiber in any liquid including water. The ends of the fiber should not come into contact with any liquid since the liquid can migrate between the outside cladding and the fiber thereby causing damage and reducing its ability to transmit light.