What is induction lamp?
The basic technology for induction lamp is not particularly new and has been around over 100 years . Essentially, an induction lamp is an electrodeless fluorescent. Without electrodes, the lamp relies on the fundamental principles of electromagnetic induction and gas discharge to emitting UV radiation that in turn is converted into visible white light by the phosphor coating on the bulb. The elimination of filaments and electrodes results in a lamp of unmatched life. Lasting 100, 000 hours or 25 years, this system can outlast 100 incandescent, five HID, or five typical fluorescent lamp changes.
How does induction lamp work?
External magnetic induction lamps are essentially fluorescent lamps with electromagnets wrapped around a section of the lamp tube. High frequency energy, from the electronic ballast (generator), is sent through wires, which are wrapped in a coil around the ferrite inductor, creating a powerful magnet.
Induction coil produces a very strong magnetic field which travels through the glass and excites the mercury atoms in the interior which are provided by a pellet of amalgam (a solid form of mercury). The mercury atoms emit UV light and, just as in a fluorescent tube, the UV light is up-converted to visible light by the phosphor coating on the inside of the tube. The system can be considered as a type of transformer where the inductor is the primary coil while the mercury atoms within the envelope/tube form a single-turn secondary coil.