Lumen(LM)
Lumen is the international unit of luminous flux. It is defined based on the Candela spherical angle (cd times sr). A lumen is an equivalent amount of light emitted in 1 spherical angle unit, emitting an equal amount of energy in all directions from the light source, and with an intensity of 1 cd.
One lumen is equal to the electromagnetic energy (EM) radiated at a frequency of 540 terahertz (540 THz or 5.40 x 10 Hz) in 1.46 milliwatts (1.46 x 10^-3W). Reduced to the SI base unit, 1 lumen is equal to 0.00146 kilogram square meters per second in cubic units (1.46 x 10 kg times m/s).
A lumen is a small unit. 1.46 milliwatts is a very small level of EM field force. Children's toy two-way radios have radio frequency (RF) products with outputs several times higher. The frequency of 540 THz corresponds to a wavelength of about 556 nanometers (nm) in the visible light spectrum. The spherical angle is a fixed angle in three dimensional standard units; the sphere contains 4 pi (approximately 12.57) spherical angles.
LM/W, the meaning of the representative: the total amount of light emitted by each watt of light-emitting object For example, the total amount of light emitted by a 12W energy-saving lamp in 1080LM. then each W in 90LM. on the light is 90 lm/w light source efficiency The higher the value of lm/w represents the high luminous efficiency of the luminous body, one of the criteria for evaluating the merits of the luminous body.
Ilumination, Lux(LX)
When the luminous flux obtained on an area of 1 square meter is 1 lumen, its illuminance is 1 lux. It can be labeled as lux, or lx for short.
Lux is the derived unit, derived from the lumen (lm). Lumens are then derived from the standard unit candela (cd).
Illuminance is a physical quantity reflecting the intensity of light, its physical meaning is the amount of luminous flux irradiated to the unit area, the unit of illuminance is the number of lumens (lm) per square meter, its unit is lux (lux or lx), that is: 1lux = 1lm/m2.
Color Temperatrue(CT)
Color temperature is a measure of temperature, usually used in the field of physics and astronomy, and the concept is based on the idea that an imaginary black object, when heated to different temperatures will emit different colors of light and its object will appear as different colors. Just like when heating a block of iron, the iron first turns red, then yellow, and finally will turn white.
Using this method to calibrate the color temperature and the general public think that the "warm" and "cold" is the opposite, for example, people usually feel that red. Orange and yellow are warmer, white and blue are cooler, but in fact the color temperature of red is the lowest, and then gradually increase is orange, yellow, white and blue, blue is the highest color temperature.
The color temperature of the light source varies, bringing different feelings. High color temperature light source illumination. If the brightness is not high will give people a cold feeling; low color temperature light source irradiation, the brightness is too high will give people a hot feeling. The lower the color temperature, the warmer the tone (reddish); the higher the color temperature, the colder the tone (blue).
Color render index(CRI)
The color rendering ability of a light source to an object is called color rendering, and is determined by comparing the color of an object's appearance with that of a reference or reference light source of the same color temperature (incandescent light or picture light). The spectral content of the light emitted determines the light color of the light source, but the same light color can be made by many, few or even just two monochromatic light waves, the color rendering of each color is also very different.
Light sources of the same light color will have different spectral composition, the spectral composition of a broader light source is more likely to provide better color rendering quality. When the light source spectrum has little or no main wave reflected by the object in the reference light source, the color will produce a significant color difference. The greater the degree of chromatic aberration, the poorer the color rendering of the light source for the color. The color rendering index coefficient is a universal method for defining the color rendering evaluation of a light source.
Normally, BIGLUX solar LED light's parameters: LED lamps have a life expectancy of more than 50,000 hours. 100-150lm/w, CRI 70-80, CT 5000-6000K(Daylight). Specific parameters are subject to change depending on the customer's requirements for the lighting project. We will simulate the lighting effect for our customers several times to find the best solutions.
