Fluorescent lamps, energy-saving lamps are low-pressure […]
Fluorescent lamps, energy-saving lamps are low-pressure mercury vapor arc discharge lamps, usually long tubular, with one electrode at each end. The lamp contains a low-pressure mercury vapor and a small amount of inert gas, and the inner surface of the lamp is coated with a phosphor layer. Fluorescent lamps are divided into straight tube fluorescent lamps and compact fluorescent lamps. Straight tube type fluorescent lamps can be divided into preheating start, quick start and instant start according to the starting mode. According to the lamp, it can be divided into T12, T8 and T5. Compact fluorescent lamps are developed to replace incandescent lamps that consume a lot of power, and have the characteristics of low energy consumption and long life. The life of an ordinary incandescent lamp is only 1000 hours, and the typical life of a compact fluorescent lamp is 8000-10000 hours.
Advantages and disadvantages of fluorescent lamps and energy-saving lamps:
The main advantage of fluorescent lamps is their high luminous efficiency. A typical fluorescent lamp emits about 28% of the visible light. The geometry of the lamp, the filling gas and pressure, the phosphor coating, the manufacturing process, and the ambient temperature and power frequency all have an effect on the luminous efficacy of the fluorescent lamp. The color of the light emitted by the fluorescent lamp is largely determined by the phosphor applied to the inner surface of the tube. The color temperature of different fluorescent lamps varies widely, from 2900K to 10000K. According to the color, it can be roughly divided into warm white (WW), white (W), cool white (CW), and daylight (D). Normally, warm white (WW), white (W), and daylight (D) fluorescent lamps have general color rendering, and cool white (CW), soft white, and advanced warm white (WWX) fluorescent lamps provide better color rendering. , Advanced Cool White (CWX) fluorescent lamps provide excellent color rendering. Fluorescent lamps emit light that is scattered and not easy to focus, so it is widely used for softer lighting, downlighting, uplighting, work lighting, soft accent lighting, etc.