Lighting using a special florescent light bulb. Advantages: white light easily obtainable, can be very bright. Disadvantages: complex drive circuitry, limited life (roughly 5,000 hours), limited cold-temp operation, fragile.
Cold Cathode Fluorescent Lamp. Increasing high voltage between two electrodes of the CCFL, electrons will shoot from the electrode, speeded up by high voltage and collide with mercury atom. After colliding, there is an overflow of the energy that occurs from the mercury atom returns rapidly from unstable state to stable state radiates by ultraviolet (253.7 nm). The radiate ultraviolet is absorbed by fluorescent powder and transforms to visible light.