Light Trespass

[edit] Definition of light trespass

Light trespass occurs when there is a light spill or if light is cast where it is not wanted. It is somewhat subjective because it is difficult to define when, where, and how much light spill is acceptable or unacceptable. An example of light trespass is when light from a street or floodlight enters a neighbouring window.

There are various solutions to mitigate light spill or light trespass through the design of the lighting or ancillary items such as louvres, one such example is given below.

[edit] Lighting solutions - anti glare and diffusion

Louvres can provide essential glare control by creating directional light diffusion, source concealment and glare control. The effectiveness of a system depends on the materials being used and design of the system.

It is possible to use metal fabrics that are directional, thus reducing light penetration in certain directions, whilst letting light through in other directions.

One such example is a thin and light metal louvre, corrosive-resistant directional fabric for use inside or out. There are up to 700 paper-thin miniature bronze louvres woven into every metre of fabric. The tiny louvres are usually given a standard protective black polyester coating for a durable finish, absorbing and eliminating re-reflected heat, light and glare. They can be any colour, as well as having a matt or highly reflective finish to suit. The standard louvre angles are 17° and 0°. Angles between 17° and 0° can be produced on application. It can be used for various lighting purposes, including in: trading floors, museum or exhibition displays, shading traffic lights, and buildings and bridges around the globe.

--smartlouvre

[edit] Related articles on Designing Buildings

• Light spill.
• Louvre specifications.
• Retrofitting solar shading.
• Shutter.
• Solar shading.
• Solar shading design.
• Types of window.
• Weather louvres can combat and complement the effects of climate change.
• Window.