How to choose LED lighting?

One, choose lumen/watt high LED lighting lamps

Luminous flux, that is, the total amount of visible light emitted by the light source in unit time, unit: lumen (Lm).

Luminous efficiency, that is, the light energy emitted by the light source per W electrical power (commonly known as luminous flux), unit: lumen/watt (Lm/ W)

It refers to the luminous efficiency of a finished LED lamp.Under the rated voltage, the value of the total luminous flux emitted by the LED lamp divided by the total power consumed by the LED lamp is the comprehensive luminous efficiency of the LED lamp, expressed by lumen/watt. The higher the value, the better the effect of the lamp festival and the more power saving.At the same power, high luminous efficiency lamps and lanterns, luminous flux, more bright, more energy saving!The 3W LED bulb is higher than the 18W CFLS.And about eight times as much as a 40-watt incandescent.

Second, the choice of color index high products

Chromogenic it is to show the close degree that the object shows color and true color below lamplight illuminate.The larger the color rendering index "Ra", the closer the color the object presents to the real color.It is generally believed that: 80 ~ 100, good color;50 ~ 79, general color rendering: < 50, poor color rendering.Should choose the color index high LED lighting lamps.

Three, the choice of illuminant color temperature depends on individual be fond of

The unit of color temperature is kelvin (K). The color temperature of red light source is about 800K ~ 900K, the color temperature of yellow and white light source is about 3000K, the color temperature of white light source is about 5500K, and the color temperature of light blue light source is about 8000K ~ 12000K.The choice of illuminant color temperature depends on everybody's be fond of, some person likes warm color to move, so 3000K the lamp of about color temperature suits him, the person that likes sunlight color 5000K ~ 6500K the lamp of color temperature can satisfy a requirement, those who like cool color is tonal choose the LED illume lamps and lanterns of 8000K~12000K.

The smaller the light decay, the better, the greater the luminous flux

What is light decay: the gradual decay of the luminous flux of a light source to the point of exhaustion.

What is the optical flux maintenance rate: when the lamp is lit under specified conditions, the initial value is the luminous flux measured 100 hours after the light point, and the ratio of the luminous flux measured 2000 hours after the light point is expressed as a percentage (not less than 80%), which is the concept of lighting to measure the light decay.

A popular explanation is that the brightness of a light decreases after it has been used for a period of time.For different light sources, the higher the flux maintenance, the smaller the light attenuation.