What are the parameter types LED street lamp type lighting products

1, luminous intensity, luminous intensity is the direction of the light source in a given unit solid Angle in the launch of the definition of luminous flux, luminous intensity of leds, often referred to as the luminous intensity on normal direction. The unit is candela ( Symbol for CD) 。 As a result of the general LED LED intensity

1. Illuminance luminous intensity is the light source in a given direction to the definition of the launch of the luminous flux per unit solid Angle. The luminous intensity of leds usually refers to the normal direction of luminous intensity. The unit is candela ( Symbol is CD) 。 Because ordinary light emitting diode luminescence intensity is small, so the luminous intensity usually measured with milli candlelight. 2. Brightness is refers to the lighting objects of luminous intensity per unit area, its unit of measurement is the nita, ( nit) Nita, 1 = 1 CD/m2. 3. Luminous flux source of luminous flux is refers to the amount of light which the photosource sends out aftertransmits the unit time. The unit is the lumen ( lm) 。 4. Lighting light source of light irradiation on objects in illumination intensity, object reflects light to the eyes of the intensity of the expressed in brightness. The same light to illuminate the same distance on the white and black paper, with the same intensity of illumination and the brightness of the different. Illuminance x reflectivity is called brightness. Lumen flux evenly distributed on the surface of 1 square meters to produce light. Unit lux street light marks ( lx) ，1 lx = 1 lm/m2。 5. Light emitting diode luminescence efficiency light-emitting efficiency is an important indicator of measure light energy saving, the source of luminous flux, divided by the consumption of light source power. Unit: lumens per watt ( Lumens/watt) 。 Through the current of light-emitting diodes and light-emitting diodes (oleds) forward voltage drop is the product of light-emitting diodes, power consumption, only part of the electrical energy is converted into light energy, and the other part is converted into heat energy. 6. Light-emitting diodes (leds) of colour developing index of illuminant color by color rendering index ( Ra) Said the color rendering index said under the illumination of the color of the object relative to the reference light color deviation degree, and can comprehensively reflect the color of the light source characteristics. The sun color rendering index set for 100, all kinds of light source color rendering index, such as high pressure sodium lamp color rendering index of ra, color rendering index of fluorescent tube is 60 - ra 90. White light-emitting diodes (leds) color rendering index; 70. ( : the above content published by LED lights manufacturer for you]