LIGHTING FIXTURE AND ITS DISTRIBUTION

Lighting Fixture

A light fixture (US English), light fitting (UK English), or luminaire is an electrical device used to

create artificial light by use of an electric lamp.

Types of Luminaire

Luminaires are the fixtures that house lights. They greatly affect both the brightness and the

spatial distribution of the light, because they bounce and/or filter the light from their lamps, for

different effects.

Types of luminaires are generally categorized by their light distribution. Some common

distributions are shown below:

Lighting Layout

Given the wide choice of different lamps and luminaires available, there is an almost

infinite set of different arrangements of electric lights within a room that will provide a certain

illumination level.

The primary concern in lighting layout is to avoid glare on activity surfaces. Such glare is

a result of light bouncing directly into user's eyes, rather than diffusely.

SUMMARY

Distributions of Lighting

Direct Lighting – means 100% of the light directed down

Semi-Direct Lighting – means Smaller portion direct up - Most of the light directed down

General-Diffuse Lighting – means Light directed evenly around

Direct-Indirect Lighting – means 50% of the light directed up - 50% of the light directed down

Semi-Indirect Lighting – means Most of the light direct up - Small portion of the light directed

down

Indirect Lighting – means 100% of the light directed up

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