Light source

Lighting light source because of their different light conditions, the photoelectric properties of different. In order to correctly choose the light source for lighting,electrical characteristics, must be on their optoelectronic properties andapplicable occasions of understanding.

Classification of 1, light source:

Classification of lighting source is in accordance with the different classification in the form of light. It can be divided into radiation source and gas discharge light source for lighting two categories. The former is the use of current through theelectrical wire, it is heated to incandescence state emits visible light; the latter is the use of certain elements of the atoms are electron excitation and produce radiation.

The main characteristics of index 2, common lighting light source:

Lighting type light effect

(Lm/W)

Color rendering index Ra

Color temperature

(K)

Color temperature

Strobe

Effect

The average life span (H)

Then ignite

Time

Remarks

(power range)

Incandescent lamp

6.5 20

95 99

24002700

Warm

No

1000

Instantaneous

15W - 500W

Tungsten halogen lamp

15 30

95 99

280 3300

Warm

No

2000

Instantaneous

20W - 120W

Halophosphate fluorescent lamps T10, T12

40 60

50 60

2700

4000

5400

Warm

The middle color of daylight

Yes

6000

1 - 4S

20W - 120W

The three primary colors fluorescent

Light T8

60 80

80

2700

4000

5400

Warm

Intermediate colour

Daylight color

Yes

10000

1 - 4S

18W - 120W

Compact fluorescent lamp

50 60

80

2700

4000

5400

Warm

Intermediate colour

Daylight color

No

8000

< 1s

3W - 120W

Low pressure sodium lamp

90 160

-

2000

Warm

Yes

20000

8-10min

18W - 180W

High pressure sodium lamp

80 100

25

5500

Cool color

Yes

20000

8-10min

35W - 180W

High pressure mercury lamp

40 60

30 50

4000 6500

Cool color

Yes

10000

8-10min

50W - 1000W

Metal halide lamp

60 80

80 95

4000 6500

Cool color

Yes

8000

8-10min

35W - 3500W

Lamp noun explanation

The luminaire efficiency:

Luminaire efficiency refers to the measured emission lamp luminous fluxdetermination values of the ratio of flux with all light emitted within the prescribed conditions.

The 1/2 illumination angle

The lamp axis vertical, horizontal plane of a point light, as the horizontal illuminance for the lamp shaft straight under illumination 1/2, angle formed by thispoint and the optical center line and the lamp axis called the 1/2 illumination angle.

In the distance than the layout of lamps and lanterns

Between two adjacent lamp with a distance of L type lamp, lamp mounting heightis H, then the distance into the =L/H.

In the embedded lamp: complete luminaires part is embedded into the mounting surface.

In the ordinary lamps: provide protection to the live parts, but no lamp specialdustproof and waterproof grade of solid particles.

The choice of lamps and lanterns:

In lighting design, the main factors that should be considered in selection of lightis:

In light of requirements of distribution, surface brightness lamps, color performance, degree of glare.

In the environmental conditions, the requirements of protective use environment.

In the coordination, the lamp appearance is with building and interior decorationcoordination.

In the economy, such as lighting efficiency, power consumption, investment and operation cost, energy saving effect.

Lighting quality

A, glare:

In the view of brightness very bright objects or strong brightness contrast, can cause discomfort or cause visual decrease, called glare. Glare can be divided into disability glare and uncomfortable light, those who reduce eye's glare, allmake the person produces the unhappy feeling called discomfort glare. Glare is one of the important factors affecting the quality of lighting.

The reason of glare:

The high brightness stimulus. Make the pupil.

The result of corneal crystal intraocular tissues produce scattering, light screen formed in the eye;

The retina was stimulated by high brightness, adapt to state failure

The main factors of lamps produce glare:

The light source luminance (brightness is high, the more significant the glare)

The position of the light (closer to the line of sight, the glare of the more significant)

The size and the number of \ \ light appearance (the larger the surface area, the more the number of the light source, the more significant the glare)

The surrounding environment (environmental brightness is dark, eyes very lowadaptation luminance, glare is significant)