C4-11:12

Question 1

Proper design of a lighting installation requires use of two calculating procedures:

Answer 1

1. Computing illuminance from a point source
2. Computing average illuminance levels

Question 2

In lighting design, E is used as a symbol for __________. And I is the symbol for ___________.

Answer 2

Illuminance and luminous intensity

Question 3

States that the illuminance at a point on a plane perpendicular to the line joining the point and a source is inversely proportional to the square between the source and the plane.

Answer 3

Inverse square law

Question 4

States that illuminance (E) at a point on a plane is proportional to the cosine of the angle of light incidence, where the angle of light incidence is measured between the direction of the incident light and the normal to the plane of the surface.

Answer 4

Cosine law of incidence

Question 5

Average illuminance at a reference work plane.

Answer 5

Target illumination

Question 6

Usually horizontally positioned, at which work is performed and on which the illuminance is specified and measured.

Answer 6

Work plane

Question 7

The currently accepted method for calculating average illuminance levels for indoor areas unless the light distribution is extremely asymmetric.

Answer 7

Zonal cavity method

Question 8

A room is made up of three spaces called ________.

Answer 8

cavities

Question 9

The space between the luminaires and the work plane is referred to as the ________.

Answer 9

room cavity

Question 10

The space between the work plane and the floor is called the ___________.

Answer 10

Floor cavity

Question 11

The space between the ceiling and the luminaires is defined as the _________.

Answer 11

ceiling cavity

Question 12

Is an approximate maximum spacing-to-mounting height ratio required to ensure uniform illumination on the work plane.

Answer 12

Spacing Criterion

Question 13

It is the center-to-center luminaire spacing.

Answer 13

Spacing

Question 14

The distance between the plane of the luminaires and reference work plane.

Answer 14

Mounting height

Question 15

The power consumed for illumination divided by the area served by the lighting installation. It is frequently used as a measure of installed building lighting efficiency.

Answer 15

Unit power density

Question 16

Both a science and an art, and there is no single correct lighting solution for all situations.

Answer 16

Architectural Lighting Design

Question 17

A non uniform, balanced use of all types of architectural lighting. Tends to create a composition quality that best suits good atmosphere within most spaces by blending color rendering and other properties of the different light sources.

Answer 17

Layered Light

Question 18

The most essential form of lighting because it is the basic background of light for almost every room.

Answer 18

Ambient Lighting

Question 19

Illuminates a specific visual function and can influence the effectiveness of the individual performing task.

Answer 19

Task/Local Lighting

Question 20

Used to add drama and emphasize a particular object or area.

Answer 20

Accent Lighting

Question 21

Aesthetically adds interest to the space by blending with other types of lighting to give an overall “feel” to a space.

Answer 21

Decorative Lighting

Question 22

The transitional space from public to private and exterior to interior. If offers the first impression of a home or building.

Answer 22

Entrances

Question 23

This space can take advantage of a beautiful vista out the window and good natural ambient light daylight. At night, an ambient light source should be provided to compensate for daylight.

Answer 23

Offices/Studies

Question 24

In this space, the best light washes the face from all directions, softening shadows. There should be sufficient light to see detail for grooming but not so much to cause glare and discomfort.

Answer 24

Restrooms/Bathrooms

Question 25

In this space, lighting should make the food, the table setting, and the people look attractive, so excellent color rendition is a must.

Answer 25

Dining Spaces

Question 26

A variety of switches and controls are used to manage operation of lighting installations.

Answer 26

Lighting System Controls

Question 27

Is an electrical device that opens an electrical circuit, thereby shutting the lights off or closing the circuit to energize the lighting installation.

Answer 27

Switch

Question 28

Switches are a simple on/off switch that controls a lighting installation from one location.

Answer 28

Single-Pole, single-Throw (SPST)

Question 29

Are required to control a lighting installation from two locations.

Answer 29

Two three-way switches

Question 30

Deactivate the lighting circuit after a preset time period has lapsed.

Answer 30

Automatic Switches

Question 31

Can be used to vary the luminous flux (lumen output) from lamps in a lighting installation.

Answer 31

Dimmer switches

Question 32

Limit access to switches for lights and equipment to authorize personnel only.

Answer 32

Keyed Switches

Question 33

Can activate a lighting circuit when a door is open and closed.

Answer 33

Door switches

Question 34

Can be used to control the time period that a lighting installation operates.

Answer 34

Time clocks

Question 35

Automatically control operation of a lighting installation with electronic components that are wired into the circuitry.

Answer 35

Electronic Timers

Question 36

Sense light and can be used to control night lighting in lieu of a time clock or timer.

Answer 36

Photocell Controls

Question 37

Control a lighting installation by sensing occupants in a space and usually mounted on the wall or ceiling.

Answer 37

Occupancy Sensors

Question 38

Offers building operators full control of multiple lighting installations from a single location.

Answer 38

Central Lighting Control System