For LED lighting fixtures, high-power LED beads and LED point light sources are commonly used light sources. For outdoor lighting LED projection lamp, the quality of lamp beads is of great importance. So how do we evaluate the quality of LED lamp beads?
LED brightness is different, the price will be different. Lamp cup: general brightness is 60-70lm; bulb lamp: general brightness is 80-90lm. The brightness of 1W red light is generally 30-40lm; that of 1W green light is generally 60-80lm; that of 1W yellow light is generally 30-50lm; and that of 1W blue light is generally 20-30lm.
Led with strong anti-static ability has long service life and high price. Generally, led with anti-static voltage greater than 700V can be used for LED lighting. Led with the same wavelength has the same color. If the color is required to be the same, the price is high. It is difficult for manufacturers to produce pure color products without led spectrophotometer.
LED is a one-way conductive light-emitting body. If there is reverse current, it is called leakage current. Led with large leakage current has short life and low price. The luminous angles of LEDs with different uses are different. Special lighting angle, high price. The key to different qualities is life, which is determined by light decay.
