照明常用术语（Lighting terminology）.docVIP

照明常用术语（Lighting terminology） Lighting terminology Lighting terminology Green lighting, lighting design through science, with high efficiency, long service life, safety and stability of the PPP lighting products, lighting system is efficient, comfortable and safe, economical and beneficial to the environment and improve peoples physical and mental health and reflect the modern civilization and ultimately achieve. An energy-saving lamp is an illumination product that consumes less electricity and achieves higher lighting effects, such as fluorescent lamps, ring lamps, straight fluorescent lamps, compact fluorescent lamps, etc. Luminous maintenance rate ---- the burning of a lamp under prescribed conditions. The ratio of the luminous flux of a lamp to the initial luminous flux of a lamp at a specified time during its lifetime is expressed as a percentage. GB requirements: 2000h no less than 78%. Foreign advanced level: 2000h is no less than 90%. U. S. Energy Star: 40% rated life of not less than 80%. Domestic level: pay attention to the quality of the enterprise, and the use of protective membrane process, basically can reach gb. Power factor ---- the product of the effective value of the voltage in the AC circuit and the current effective value is the apparent power, while the active power is only part of it. The power factor is the ratio of the active power to the apparent power of the lamp. When the power factor is low, the higher harmonic content in the current will pollute the power grid, destroy the balance of the power grid, and increase the reactive power loss Lighting technology, like any other technology and science, has its proprietary terminology. These special terms and concepts are used to define the special PPP of lamps and lanterns and to unify the units of measurement. Here are some important lighting terms. Light and radiation (Light, and, radiation) Light refers to the human eye can perceive as bright electromagnetic radiation, but also can be said t