In LED street lamp products, LED light source is very important, and its performance directly affects the overall performance of the product. LED light source commonly used nouns are "light effect", "beam", "color temperature", "color index", "light attenuation" five, today first introduce the first three nouns meaning.

Light effect: the ratio of the total beam emitted by the light source and the power consumed by the light source (watt) is known as the light effect of the light source. The unit lm/w (lumen/watt) is an important indicator of the light effect measurement of LED light source. The higher the light effect, the more energy the LED has

Light beam: it is the sum of light energy that the human eye can accept from the light source, unit lm (lumen). The light beam is detected by detection equipment (dispersed photometer/integrating sphere), and the light effect can be calculated according to the power of the light source. The size of the light beam can directly reflect the size of the luminescent light energy

Color temperature: Color temperature is an important parameter reflecting the color of LED light source. People are moving from the earliest era of pursuing high color temperature to the current era of pursuing warm white and close to natural light. The high "brightness" of the earliest high-color temperate zone has lost out to the dazzling cold white light, so people continue to seek more comfortable lighting effects.