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How to choose LED lights?

  • Categories:Company news
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  • Time of issue:2019-09-24 16:11
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(Summary description)

How to choose LED lights?

(Summary description)

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2019-09-24 16:11
  • Views:
Information
How to choose LED lights?
 
1. luminous flux
 
Luminous flux is the first important parameter of all luminaires. It refers to the radiant power that can be felt by the human eye. It is equal to the product of the radiant energy of a certain band per unit time and the relative visibility of the band. For luminaires, this parameter is "the sum of the visible light emitted by the luminaire per unit time." Unit: Lumen, symbol lm.
 
Shopping advice: For the same type of LED lights, this parameter must exceed the minimum limit as high as possible. (Note that if the LED is too bright, there will be severe glare and the eyes will be uncomfortable.) The parameter that really determines the quality of the illumination is the illuminance - "the luminous flux of visible light received per unit area",
 
2. Power
 
The amount of electricity consumed by this parameter lamp per hour
 
Shopping advice: In the case that the luminous flux meets the demand, the smaller the better.
(High-power lamps, heat dissipation will directly affect the life of the lamp)
 
3. Color temperature
 
Sunrise: 1900K. Midday sunshine: 5500K. The daylight is clear at 6500K. Incandescent lamp: 3000K
 
Shopping advice: The color temperature of general LED lamps is better between 4000K and 5000K. In places where there is a need for mood and comfort in the bedroom, choose 2700K-3000K.
 
4. Color rendering index Ra
 
Shopping advice: National standard requires Ra to be greater than 80 for daily use.
 
5. Lifespan
 
The life of the luminaire actually has two parts, taking the shorter time as the life of the whole lamp.
 
1. Time required for the luminous flux of the whole lamp to decrease to 70% of the initial value
 
2. The time from the ignition to the burning of the whole lamp
 
For LED luminaires, the second is much shorter than the first one. The LED life that is often claimed in the market is as long as 5W-10W hours, which refers to the first life time. The use of a single LED chip in a normal environment is far more than this life. The second test is the manufacturer's LED drive capability and heat dissipation design capabilities.
 
Shopping advice: Choose a reliable brand manufacturer's lamps, the longer the nominal life, the better. Note: The life of most LED lights is marked for 10 years, but the calculation method is like this - the whole lamp life is Y hours / X hours per day = 10 years, this "lighting X hours every day" will make up a 10 years.
 
The national standard stipulates that the life of the whole lamp is more than 25,000 hours (the calculation of this time is relatively round, and the second item is avoided to some extent), and the time declared by each manufacturer ranges from 6000H to 25000H.

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