NCIDQ IDFX Practice Exam

What is a major advantage of tungsten halogen lamps?

1. Very low voltage operation.

2. Longer lamp life and low lumen depreciation.

3. More color options than regular fluorescents.

4. No risk of explosion.

The correct answer is: Longer lamp life and low lumen depreciation.

A major advantage of tungsten halogen lamps is their longer lamp life compared to traditional incandescent bulbs and their relatively low lumen depreciation over time. Tungsten halogen lamps are designed to produce bright, consistent light and maintain their lumen output more effectively as they age. This is largely due to the halogen cycle, where the halogen gas helps to redeposit evaporated tungsten back onto the filament, thereby extending the lifespan of the lamp. When considering the other options, low voltage operation is more characteristic of specific types of halogen lamps rather than a general advantage of tungsten halogen lamps. While there may be color options available in tungsten halogen lighting, they typically do not surpass the variety available in fluorescent options. Furthermore, while tungsten halogen lamps do have less risk of explosion compared to some other types of lighting, this is more about their design which contains a more robust glass envelope, rather than a standout feature like their longer lifespan and lumen maintenance.