Light_Vocabulary

Accent Lighting Directional lighting to emphasize a particular object or draw attention to a display item.

Ambient Lighting The general lighting present in an area --excluding task lighting and accent lighting but including general lighting and daylight streaming in.

Black Light A popular term referring to a light source emitting mostly near UV (320 to 400 nm) and very little visible light.

Bulb A loose way of referring to a lamp. "Bulb" refers to the outer glass bulb containing the light source.

Brightness Brightness can refer to any of several technical terms used in lighting and is, therefore, ambiguous

Glare Visual discomfort caused by excessive brightness is called discomfort glare. If task performance is affected it is called disability glare. Glare can be direct glare or indirect (reflected) glare

Iluminance The "density" of light (lumens/area) incident on a surface; i.e. the light level on a surface. Illuminance is measured in footcandles or lux.

Indirect Lighting The method of lighting a space by directing the light from luminaires upwards towards the ceiling. The light scattered off the ceiling produces a soft, diffuse illumination for the entire area.

<span style="color: #f109cb; font-family: Georgia,serif; font-size: 130%;">Light <span style="display: block; font-family: Georgia,serif; font-size: 130%; text-align: center;">Radiant energy that can be sensed or seen by the human eye. Visible light is measured in lumens. <span style="display: block; font-family: Georgia,serif; font-size: 130%; text-align: center;"> <span style="display: block; font-family: Georgia,serif; font-size: 130%; text-align: center;"> <span style="display: block; font-family: Georgia,serif; font-size: 130%; text-align: center;">