What is Induction Lamp

Horace He

Last Updated: August 7, 2023

What is Induction Lamp

An induction lamp is a type of lighting technology which operates based on the principle of magnetic induction, utilizing external radio-frequency or microwave radiation to stimulate the gases and metals within the lamp tube. This stimulation causes the emission of ultraviolet (UV) radiation. To produce visible light, a phosphor coating is applied to the lamp tube, which is then excited by the UV radiation and emits the desired wavelengths of visible light.

Induction lamps offer several advantages over traditional fluorescent lamps. They have a longer lifespan due to the absence of internal electrodes, which are a common point of failure in regular fluorescent lamps. Additionally, induction lamps are known for their energy efficiency, improved safety conditions, enhanced visual performance, and environmental friendliness.

There are two types of induction lamps: internal magnetic induction lamps and external magnetic induction lamps.

  • Internal magnetic induction lamps feature a light bulb-shaped glass lamp with a central cavity coated with phosphors. This cavity is filled with inert gas and a pellet of mercury amalgam. An induction coil, excited by high-frequency energy from an external electronic ballast or generator, is wound around a ferrite shaft inserted into the central cavity. The coil creates a magnetic field that excites the mercury atoms, leading to the emission of UV light that is converted to visible light by the phosphor coating.
  • External magnetic induction lamps, on the other hand, are similar to fluorescent lamps but with electromagnets wrapped around a section of the lamp tube. High-frequency energy from an electronic ballast is sent through wires wrapped in a coil around a ferrite inductor, generating a powerful magnetic field. This field excites the mercury atoms inside the lamp, causing the emission of UV light that is then converted to visible light by the phosphor coating.

Frequently Asked Questions

What Does Induction Mean in Lighting

Induction lighting refers to a type of fluorescent lighting technology that utilizes electromagnetic energy to initiate a series of reactions, resulting in the production of light by phosphors. Unlike conventional fluorescent lighting, induction lighting does not have a filament or electrodes, making it more efficient and significantly longer-lasting.

What Is Induction Lamps Used For

This type of lighting has a long history of over 100 years and can last up to 100,000 hours. Due to its durability, induction lighting is commonly utilized in industrial settings like factories and for roadway lighting in street lights.

What Is a Major Advantage of Using Induction Type Lamps

The primary benefit of utilizing induction type lamps is that they do not have electrodes, which are a common point of failure in traditional fluorescent lamps. As a result, induction lamps have an exceptionally long lifespan, rated at 100,000 hours.

What Is the Difference Between Fluorescent Lamp and Induction Lamp

Induction lamps distinguish themselves from fluorescent lamps by not utilizing internal electrodes. Instead, they employ a high-frequency generator with a power coupler. This generator generates a radio frequency magnetic field to stimulate the gas fill.