Let there be LIGHT, and there is LIGHT

Question 1

The _____ of light output from a source is called __________, and it defines the time rate flow of light.

Answer 1

quantity, luminous flux

Question 2

What is the unit for luminous flux?

Answer 2

Lumen (Lm)

Question 3

The density of light flux measured on a surface is known:

Answer 3

Illumination
or
luminous flux density

Question 4

What is the unit for illumination?

Answer 4

Lux (Lx)

Question 5

What are the two fundamental equations dealing with lighting calculations?
1.
2.

Answer 5

1. Inverse Square Law
2. Cosine Law of Incidence

Question 6

What is efficacy?
HINT: Luminous Efficacy

Answer 6

Efficacy is a ratio of the light output (lumen) compared to the power input (watts) for a light source.

Question 7

Factors in lighting design:
The three different lighting design are…..
1.
2.
3.

Answer 7

1. General lighting
2. task lighting
   3 Accent lighting

Question 8

An adequate quantity of light does not always provide good illumination factors that contribute to the quality of light must also be considered.
Some other considerations include:

Answer 8

Glare
Diffusion
Color

Question 9

Red, orange and yellow tend more to produce a feeling of ______.
Blues and greens to produce a ______ effect and create an illusion of increased space.

Answer 9

Warmth, Cool

Question 10

What is a Luminaires?

Answer 10

A luminaire is a complete lighting unit consisting of lamps, wiring channel, reflectors, lens, diffusers, and control gear (such
as ballasts for gas discharge lamps) where necessary. chupappi munanyo con cac

Question 11

The five luminaires are usually classified on the basis of how they distribute light vertically — either upwards or downwards are…….

Answer 11

1. Indirect
2. General diffuse
   3.Semi-indirect
   4.semi-direct
3. direct

Question 12

The selection of luminaires is usually made based on:

Answer 12

1. Luminaire efficiency
2. Coefficient of utilization
3. Spacing-to-mounting height ratio

Question 13

The choice of the light source for luminaires is:

Answer 13

Incandescent
fluorescent
high-intensity discharge (HID)
low-pressure sodium
LED