Question
Download Solution PDFFor which of the following purposes are low voltage lamps used?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- In earlier days low voltage incandescent lamps are used for automotive lighting. These lamps are available for 6, 12, and 24 V applications.
- Incandescent bulbs radiate invisible infrared light along with visible light.
- Then low voltage halogen lamps are used for automotive lighting. Whish has twice the light output, higher color temperature, and double service life than incandescent lamps.
- Nowadays low voltage LED lamps are being used for automotive lighting.
Important:
|
Type |
Application |
Advantage |
Disadvantage |
|
Standard Incandescent bulbs |
- Domestic use - Localized decorative lighting |
- Direct connection without intermediate switchgear - Reasonable purchase price - Compact size - Instantaneous lighting - Good color rendering |
- The low luminous efficiency and high electricity consumption - Significant heat - Short service life |
|
Halogen Incandescent bulbs |
- Spotlighting - Intense lighting |
- Direct connection - Instantaneous efficiency - Excellent color rendering |
- Average luminous efficiency |
|
Fluorescent tube |
- Shops, offices, workshops - Outdoors |
- High luminous efficiency - Average color rendering |
- The low light intensity of a single unit - Sensitive to extreme temperature |
|
High-pressure mercury vapor |
- Workshops, halls hanger. Factory floors |
- Good luminous efficiency - Acceptable color rendering - Compact size |
- Lighting and relighting time of a few minutes |
|
High-pressure sodium |
- Outdoors - Large halls |
- Very good luminous efficiency |
- Lighting and relighting time of a few minutes |
|
Low-pressure sodium |
- Outdoors - Emerging lighting |
- Good visibility in foggy weather - Economical to use |
- Long lighting time (S min) - Mediocre color rendering - Lighting and relighting time of a few minutes |
|
Metal halide |
- Large areas - Halls with high ceilings |
- Good luminous efficiency - Good color rendering - Long service life |
- Lighting and relighting time of a few minutes |
|
LED |
- Signaling (3-color traffic lights “exit” signs and emergency lighting) - Automotive lighting |
- Insensitive to the number of switching operations - Low energy consumption - Low temperature |
- A limited number of colors - A low brightness of the single unit |
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