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Light and Lighting Essentials
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1
Question
What percentage of all incoming information does the human eye handle?
Page 1
Answer
Around 80%
2
Question
Without light, why would visual perception be impossible?
Page 1
Answer
Light is the medium that makes visual perception possible.
3
Question
How did ancient cultures view the light of the sun?
Page 1
Answer
Venerated as a god that determines the pulse of life and the constant yet subtly changing alternation of day and night.
4
Question
What effects does insufficient light or darkness have on humans?
Page 1
Answer
Gives rise to a sense of insecurity, lack of information, and loss of vital bearings.
5
Question
Besides enabling sight, how does light affect humans?
Page 1
Answer
It affects our mood and sense of well-being.
6
Question
What impacts do lighting level, light color, modeling, and switches from light to dark have?
Page 1
Answer
They impact momentary sensations and determine the rhythm of our lives.
7
Question
What is a common saying about light's importance?
Page 1
Answer
Light is life.
8
Question
What is artificial light?
Page 1
Answer
Human-made light that can emanate from sources including fire, candlelight, gaslight, electric lamps, and so on.
9
Question
In modern terms, what does 'artificial lighting' generally refer to?
Page 1
Answer
Lighting that emanates from electric lamps.
10
Question
What is a 'lamp' specifically?
Page 1
Answer
A light source typically comprising a light-emitting element contained within an outer container (bulb or tube) which emits radiation within the visible spectrum.
11
Question
How can artificial light be manipulated?
Page 1
Answer
Generally easily manipulated to achieve the required lighting outcome by focusing the light and being increased or decreased, directed, and coloured.
12
Question
What does manipulation of artificial light allow?
Page 1
Answer
Allows lighting to create a range of effects according to the requirements of a space.
13
Question
Name several types of artificial light sources.
Page 2
Answer
Incandescent bulbs, halogen lamps, metal halide, fluorescent tube, compact fluorescent (CFL), and LEDs.
14
Question
In what form do all lights emit energy?
Page 2
Answer
In the form of photons.
15
Question
Why is light essential to plant growth and vitality?
Page 2
Answer
It is a key component in photosynthesis.
16
Question
What is an incandescent lamp?
Page 2
Answer
The traditional bulb-type lamp with a glowing filament, once commonly used in residential applications.
17
Question
How are incandescent lamps generally considered in terms of energy efficiency?
Page 2
Answer
They are generally considered to be the least energy-efficient choice of electric lamp.
18
Question
What advantages do incandescent lamps have despite low efficiency?
Page 2
Answer
They are inexpensive, turn on instantly, and come in a range of sizes and shapes.
19
Question
What are compact fluorescent lamps (CFLs)?
Page 2
Answer
Compact fluorescent lights available in various sizes and fittings that can be used in place of incandescent lamps without changing light fixtures.
20
Question
How do CFLs compare to incandescent bulbs in energy efficiency?
Page 2
Answer
They are generally more energy efficient than incandescent bulbs.
21
Question
What features do some CFLs have?
Page 2
Answer
Some are dimmable and are compatible with other lighting controls.
22
Question
What variants do CFLs come in?
Page 2
Answer
Globe, spiral, floodlight, and reflector variants.
23
Question
What does LED stand for?
Page 2
Answer
Light-Emitting Diode.
24
Question
What is task lighting used for?
Page 5
Answer
Allows the completion of tasks such as reading, studying, and way-finding.
25
Question
Where is task lighting typically used?
Page 5
Answer
Where ambient light levels are insufficient for the task at hand.
26
Question
Name examples of task lighting.
Page 5
Answer
A reading lamp and under-cabinet lights.
27
Question
What is the purpose of accent lighting?
Page 5
Answer
Imparts drama and character and allows certain features regarded of interest to be highlighted.
28
Question
How does accent lighting draw attention?
Page 5
Answer
The idea is to draw the viewer's attention to the item that is lit.
29
Question
Give examples of items that accent lighting can highlight.
Page 5
Answer
A feature wall, an ornamental pool, or an expensive vase.
30
Question
What type of lamps have been widely used for accent lighting?
Page 5
Answer
White LED lamps.