a sensation caused by luminance in the visual field that are too bright, cause Discomfort, annoyance, or reduced productivity can result.

It measures the degree that perceived colors of objects, illuminated by a given light source, conform to the colors of those same objects when they are lighted by a reference standard light source.

Defined as the flow of light, Measured in lumens.

the act or process of making something clearer or brighter or a device for doing so.

a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls within a given solid angle.

a family of gas-discharge arc lamps which create light by sending an electrical discharge between two electrodes and through a plasma, or ionized gas.

This is a system designed to give approximately uniform illuminance over the whole of the working plane. The method of accomplishing this result varies from the resultant lighting on the horizontal working plane, must be same, reasonably uniform.

These are lighting system that provides illuminance for relatively small areas, incorporating visual tasks. Where visual tasks are essential to achieve a demanded level of illuminance.

Identify this Type of Lighting System:

Ninety to one-hundred percent of the light output of the luminaires is directed to the ceiling and upper walls of the room. All of the light reaches the horizontal working plane indirectly, that is, via reflection from the ceiling and upper walls

FOCUSES LIGHT ON A PARTICULAR AREA OR OBJECT. IT IS OFTEN USED TO HIGHLIGHT ART OR OTHER ARTIFACTS.

a measure of how well the light coming out of the lamps and the fixture contributes to the useful light level at the work surface.

It may be defined as “the ratio of illumination under normal working condition to the illumination when everything is clean or new”

is the depreciation of light output over the time.

It is a simplified equation of lighting design which can be used to determine the number of luminaires required for overhead lights which are arranged in a regular pattern.

The ratio of luminous flux leaving the surface to the luminous flux incident on it. It’s value will always less than 1.

The required ‘Lux’ in a room is defined by the what activity is done in the room.

The light from light fixture bounces off of all surfaces.

Refers to the 'lumens per watt' produced by different types of light sources.

often used to describe the degree of 'whiteness' for fluorescent and H.I.D. (high intensity discharge) lamps.

A pear-shaped A-19 lamps.

Combine the energy efficiency of fluorescent lighting with the convenience and popularity of incandescent fixtures and fit most fixtures designed for incandescent bulbs and use about 75% less energy.

Most common measure of light output (or luminous flux).

Illuminance is measured in _______________ , which are workplane lumens per square foot.

Referred to as brightness and is measured in footlamberts (fL) or candelas/m2 (cd/m2).

Identify the given Lamp/Bulb:

Identify the given Lamp/Bulb shown:

Identify the given Lighting Fixture:

Identify the given Lighting Fixture: