NEW HOME LIGHTING 2016

Where we want to aim the light, we may use a directional luminaire, designed to do the opposite of a nondirectional one. Directional luminaires control the spread of light to give it a real directional quality. This may be done by using simple shades and baffles or highly technical polished reflectors and lenses. Some light sources, such as dichroic spotlights, come ready packaged with a reflector to control the spread of light, and many LED light sources come bonded to a specially designed plastic lens to create a controlled beam of light. It is important to remember that the energy efficiency of a lighting scheme cannot be simply a measure of how efficient any particular light source is at producing visible light. It must take into account the quality of the luminaire and even how the luminaire will be used. Almost all the light sources you are likely to come across will naturally produce a wide spread of light. It is the reflection of light from polished surfaces or the refraction of light through transparent lenses that creates the defined beam of a directional luminaire. The reflection and refraction process is never 100 percent efficient, so the quality of the reflectors or lenses can make a significant difference to the ability of a luminaire to convert the uncontrolled light from the light source into useful directional light. This is described as the light output ratio (LOR). While a bare, fluorescent strip luminaire could have an LOR of 99 percent, a typical high-quality downlight luminaire for compact fluorescent lamps could have an LOR of 45 percent. This means more than half the light energy being produced by the light source does not make it out of the luminaire as usable light. It sounds as though the downlight is a terrible waste of energy, but all its output is within a tightly controlled spread, and can illuminate the surfaces below it to a much higher level than a bare lamp that spreads light in all directions.Homedesignq 2016 New Star Wars Iron Man 3D LED Night Lights Colorful Gradient …

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NEW HOME LIGHTING 2016

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