INDUCTION LAMPS are amongst the most efficient light sources commercially available. They offer energy saving, longer lifespan, high scotopic output and high color rendering index.
INDUCTION LAMPS are basically fluorescent lamps with electromagnets wrapped around a part of the tube, or inserted the lamp. In external induction lamps, high frequency energy from the electronic ballast is sent through wires, which are wrapped in a coil around the ferrite inductor creating a powerful magnet.
The induction coil produces a very strong magnetic field which travels through the glass and excites the mercury atoms in the interior which are provide by a pallet 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.