What are the characteristics and application scope of LED ceiling lamps from lamp manufacturers such as ceiling lamps
Jun 08, 2021
What are the characteristics and application scope of LED ceiling lamps from lamp manufacturers such as ceiling lamps
The working characteristics of LED ceiling lights are greater dispersion and poor stability. When the operating current or ambient temperature changes, its luminous efficiency and color temperature change accordingly. During the lifetime, the light effect will decrease and the color temperature will drift. Secondly, the semiconductor PN junction has poor heat resistance. Once the junction temperature is too high, the working stability will deteriorate, the life span will be shortened, or even failure. LED ceiling lights cannot be used in higher temperature environments.
The LED ceiling light has a small light-emitting area, high surface brightness, and the beam is directional radiation with a small solid angle, and contains a lot of blue light. It will make people feel uncomfortable to use it directly for lighting. Blue light has many effects on humans, such as photochemical, physical and psychological effects, the so-called "blue light effect".
Incandescent lamps have been invented for more than 130 years, and fluorescent lamps have a history of more than 70 years. People have become accustomed to living in this kind of light and color environment. Therefore, in order to improve the light color characteristics of LED lighting, the two light sources should be as close as possible to obtain the LED light color that people can fully accept. The fluorescent lamp uses mercury atoms to generate 254 nm ultraviolet rays in the excitation ionization discharge to irradiate the three primary color phosphors to obtain a light color with a color temperature of 2700-6500K. The luminous efficiency is about 110 lm/W, generally 60-80 lm/W. Generally, a light source with a high color temperature has a high luminous efficiency; a light source with a low color temperature has a low luminous efficiency.
1. LED lighting source application
At present, the highest luminous efficiency of LED ceiling lamps has reached more than 200 lm/W, and the working life is about 30,000 hours or more. If LED bulbs are used to replace incandescent bulbs, the energy-saving effect is huge; if compared with energy-saving fluorescent lamps, the improvement in light efficiency is not great. Compared with fluorescent tubes, straight-tube LED lamps have up to twice the light efficiency. The LED lamp can be continuously dimmed, which is conducive to energy saving, but the illuminance is unevenly distributed.
