Lighting

Question 1

What is a fluorescent light and where is it commonly used?

Answer 1

Tubular lights that contain mercury, must use ballast to maintain the current at a desired and constant value

Highly efficent, more efficient than incandescent

efficiency - 50-80 lumens/watt

Common in offices, classrooms, librarys; general lighting purposes

Question 2

Light Emitting diode (LED) efficiency, life span, commonly used for?

Answer 2

Strips of lighting with smaller dots/pixels, mixing of colors

Efficiency - **long life span **

Used in commercial applications, widely used for** task lights, step lights, exit signs**

Question 3

Incandescent Lighting what do they consist of, what is the efficiency, etc?

Answer 3

Typical light bulb with a small wire/needles in loops (filament)

Contains filament that gives off light when heated with electric current

Typical bulb filled with inert gas mixture such as** argon or nitrogen**

Low Efficiency - 5-20 lumens/watt
typically have high CRI value

Question 4

Tungsten Halogen

Answer 4

A type of incandescent lamp with halogen gas
Very high CRI but is inefficient

Question 5

High pressure sodium (HPS)

Answer 5

Also known as high intensity lighting
-Usually used for** street lamps**
includes mercury lamps, metal halide lamps (good CRI)
-Ass efficient as an incandescent light

Question 6

Metal Halide Lamps

Answer 6

have high CRI
A type of HID (high intensity Dishcarge lamp)

Question 7

High pressure sodium lamp

Answer 7

Type of HID Lamp
- longest life span

Question 8

Low pressure sodium

Answer 8

Type of HID lamp
- most efficient but yellow

Question 9

Which light contains nitrogen or argon?

Answer 9

Incandescent lighting

Question 10

Which light contain mercury?

Answer 10

Fluorescent lighting

Question 11

Compact Fluorescent lighting

Answer 11

• have tubular loops or spirals can be used as a light built with a lamp vs commercial ceiling tiles
• residential

Question 12

Which two lighting has the better CRI?
A. INCANDESCENT
B. COOL-WHITE DELUXE FLOURESCENT
C. WARM WHIT DELUX FLOURESCENT
D. COOL-WHITE FLOURESCENT
E. WARM-WHITE FLOURESCENT

Answer 12

A. INCANDESCENT
B. COOL-WHITE DELUXE FLOURESCENT