Final answer:
Halogen lamps contain halogen gas that extends the bulb's life, while quartz halogen lamps have a quartz envelope for high-temperature operation.
Step-by-step explanation:
Halogen and Quartz Halogen Lamps
Halogen lamps and quartz halogen lamps are two types of lighting that operate on the principle of incandescence, where light is generated by heating a tungsten filament until it glows. A halogen lamp is an advanced form of incandescent bulb that contains halogen gas, which combines with vaporized tungsten to redeposit the tungsten back onto the filament, thus extending the bulb's life. A quartz halogen lamp, on the other hand, is a type of halogen lamp constructed with a quartz envelope which allows it to operate at higher temperatures. These lamps are known for their high luminous efficacy and they produce a bright, white light.
In contrast to other modern lighting sources such as fluorescent and LED (Light Emitting Diodes), halogen and quartz halogen lamps generate light by heating the filament to a high temperature, rather than by manipulating the energy levels of electrons. Nevertheless, due to their higher efficiency and longer lifespan, LED and CFL (Compact Fluorescent Lamps) bulbs are preferred for reducing energy consumption in homes and commercial sites. LED bulbs, for instance, can emit a wide range of colors and are made from different semiconductor materials to allow for this versatility.