The terms of lighting products

◆Tricolor: the three colors of fluorescent powder of rare earth metal are red, yellow and blue; the rare earth metal under the ultraviolet shoes three kinds of colors, which are mixed the visible lights with various colors proportionally.

◆Power element: the power proportion between light-energy transformation and electric consumption. Because the electric appliance has complicated electric components itself, it consumes part of electric energy in the course of the operation, so the gained light energy is less than consumptive electric energy.

◆Stroboscopic: because the current intensity of alternative current changes periodically, the intensity of lighting varies with the intensity of the current when the lamp is lighted. But the vision exists a retentive effect (about 0.1 second). When the frequency of the light is small, the eyes can feel such change, which is called stroboscopic. The eyes are easier to be fatigue under the stroboscopic lighting, which not only influences your job, but causes eye diseases.

◆Glare: glare is glaring effect caused by improper lightness distribution and big lightness changing, and can be divided into direct glare and indirect glare.

◆Light effect: the ratio between total light flux and consumed power (Watt) is called light effect. Unit: lm/w

◆Light flux: the sum total of light quantity within the unit time is called the light flux. Unit: lm

◆Illuminance: the light flux on the unit area of the object is called illuminance. Unit: lx

◆Mean life: the mean life refers to the kindling point of the lamps, that is , the hours of kindling point when 50% of the lamps are lighting. The national standard is not less than 5000 hours. Unit: h

◆Service life: the lamp is lighted to be burn-out, or the burning point is not up to the standard accumulative hours to maintain light quantity, unit: h