Module 4, Lesson 1 Flashcards Preview

Module 4, Lesson 3 > Module 4, Lesson 1 > Flashcards

Flashcards in Module 4, Lesson 1 Deck (21):
1

Define a light source

Any device that produces light

2

Light bulbs are technically called

Lamps

3

Lamps are what in a circuit

Loads

4

illumination produced by a lamp can be measured in

Light emitted and the amount reaching a surface

5

3 light measurements

Lumen, candela, and footcandle

6

Candela characteristics

Common called "candle power" but that's incorrect, measured as the luminous intensity in a given direction, and a wax candle has the power of 1 candela

7

footcandle characteristics

The measurement of "luminous flux" or the illuminance that falls on a surface, the illuminance is one square foot distributed uniformly, and one foot away from one source of a candela and illuminance appears on a surface

8

Lumen characteristics

Measurement of "luminous flux" or unit of measurement emitted by a light source and one lumen is equal to the light striking a one square foot area

9

The most widely used term to used to rate light output

Lumen

10

Light outputs are measured in what

Wattage

11

Inverse square law

The illuminance "falls off" as the distance from the light source increases

12

2 light loss factors

Lamp lumen depreciation and dirt depreciation

13

Fixtures are often called

Luminaries

14

Luminaire functions

Provide physical support for the lamp, supply and regulate power to the lamp, and controls light distribution

15

Light source characteristics

System voltage, wattage, hours of life, and lumens of light output

16

2 points of view to characterize color

Color temp and color rendering

17

Color temp

The appearance of the light source itself

18

Color rendering

The color of the visual task percieved by the human eye

19

CRI

Way to measure a lamps color rendering ability

20

1500 K looks

Reddish

21

27000 looks

Clear blue sky