11. Lighting Flashcards
1
Q
What are the 3 main types of lamps
A
Incandescent Lamps
Discharge lamps
LED lamps
2
Q
Tungsten Filament lamps
- Type
- Properties
- Light colour
A
Tungsten Filament lamps (GLS)
- Incandescent lamps
- Have poor efficacy
- Clear white light
3
Q
Tungsten Halogen Lamps
- Type
- Properties
- Light colour
A
- Incandescent
- Longer life as the halogen stops the evaporated tungsten from darkening the bulb.
- Clear white light
4
Q
Low Pressure Mercury
- Type
- Properties
- Light colour
A
- Discharge
- Known as fluorescent lighting.
- Produces a yellowish light
5
Q
High Pressure Mercury
- Type
- Properties
- Light colour
A
- Discharge
- Good colour. correction, meaning its good for CCTV applications
- Produce a near white light with a blue tinge.
6
Q
Metal Halide
- Type
- Properties
- Light colour
A
- Discharge
- Takes a while to reach good full brightness.
- Will not restart until the pressure in the lamp has fallen.
- Best colour rendering and efficacy.
- Produces a bright white light.
7
Q
LED
- Type
- Properties
- Light colour
A
- LED
- A P-N junction diode which emits light when energized.
- Can emit many colours. Emit white by combining RGB.
- Can be used around heat or UV sensitive material as they run cool and dont emit UV.
- 6x as efficient as incandescent and last 20,000 plus hours.
8
Q
Applications of LEDs.
A
- Indication lights on devices.
- Decorative lighting.
- Signs.
- Small and large lamps
9
Q
Metal halide lamp applications
A
- Stadiums
- Photography
- Sports arenas
- Security lighting
10
Q
High pressure mercury lamp applications
A
- Factory lighting
- Car park lighting
- Street lighting
11
Q
Low pressure mercury lamp applications
A
- General offices
- Domestic premises
- Shops
- Garages/workshops