Tungsten Wire and Molybdenum Wire for Lighting: Performance, Differences and Applications

1. Main Applications of Tungsten Wire

    - Incandescent Bulbs: The core glowing component. The tungsten wire is made into a spiral shape to increase the resistance and heat accumulation effect. When energized, it is heated to 2000-2500℃ to emit warm white light, which is the most classic application of tungsten wire in lighting.

    - Halogen Lamps (Tungsten-Halogen Lamps): As the main filament, it works in a sealed cavity filled with halogen gas. The halogen cycle can reduce the evaporation of tungsten, making the filament have a longer service life and higher luminous efficiency. It is widely used in automotive headlights, stage lights, and high-precision projection lamps.

     - High-Pressure Sodium Lamps & Metal Halide Lamps: Used as electrodes. The high-temperature resistance of tungsten wire ensures that the electrode can work stably in the high-temperature discharge environment inside the lamp, promoting the ionization of the filling gas to emit light. It is suitable for street lighting, factory lighting and other large-area lighting scenarios.

2. Main Applications of Molybdenum Wire

    - Filament Support Wire in Incandescent Bulbs & Halogen Lamps: Due to its good toughness and high-temperature resistance, it is used to fix the fragile tungsten filament, ensuring that the tungsten filament is in the correct position inside the lamp and does not shake or break during transportation and use.

    - Electrode Lead Wire in Lighting Equipment: As the lead wire connecting the filament and the external power supply, it has stable conductivity and high-temperature resistance, ensuring the smooth transmission of current. It is widely used in various sealed lighting fixtures (such as vacuum fluorescent lamps, LED auxiliary lamps).

    - Auxiliary Heating Wire in Special Lighting: In some low-temperature startup lighting equipment (such as LED street lamps in cold areas), molybdenum wire is used as an auxiliary heating wire to heat the lamp body, preventing the light efficiency from decreasing due to low temperature and ensuring the normal operation of the lighting equipment.