Efficient LED street light distribution scheme

Specifically, since the advent of semiconductor light sources, bullet-type structures have been used. This package has a small current and a low amount of light. Nowadays, the current of high-power lighting level chips has reached several hundred milliamperes or even higher. Due to the low photoelectric conversion efficiency, most of the energy can only be radiated in the form of heat, and high temperature is the enemy of the chip. Continue to use the old method, without innovation, it is impossible to completely solve the problem of light efficiency and light decay of LED street lamps.

The discrete light source street lamp also has the following deficiencies in the light output: the light source plus peanut-type light distribution loss is about 15%, and the glass cover loses about 15%, and the total luminous amount after the lamp is lost is about 30%. The ultimate goal of the luminaire is to serve the people on the road. The key is to look at the application light effect of the street lamp. It is important to judge the light distribution effect and the light effect of the whole lamp surface. It is only through the light distribution that the light effect of the whole lamp surface can be improved to determine how much energy is saved. Road surface light efficiency is an important indicator for the evaluation of LED street lights. Although the relevant units have not yet issued relevant standards, any street lights should be illuminated on the road surface. Under the premise of total power, the higher the total luminous flux, the better, and the more effective light is projected onto the road surface, the better. In the light distribution of street lamps, it is unscientific to say how much lumen flux is reached by the nominal source. Especially when a single light source is made into a street lamp, about 15% of the light becomes glare and light pollution, which reduces the effective light on the whole lamp surface.

So how can we improve the light efficiency of the whole lamp? The design idea of the Green Age street lamp is like this. First, solve the problem by starting from the light source package structure. For a chip with the same amount of illumination, the luminous flux in a single package is greater than the luminous flux in a COB package. But the first thing to consider when doing street lights is the light effect of the whole lamp. COB package has the following advantages after light distribution: 1. Good color temperature consistency; 2. Easy light distribution; 3. Easy to achieve efficient light distribution; 4. Less glare and low light pollution; 5. Easy to do waterproof treatment.

Second, solve the problem from the perspective of light distribution. Unreasonable lighting design of street lamps causes too much light loss, and the energy saving effect is greatly reduced. In the future street lamps, COB is the future development direction, because under the same conditions, the road light efficiency utilization ratio of single light source is improved by 30. % or so. According to the current situation, 120W street lamps have far exceeded the effective illumination of 250W high-pressure sodium lamps, which is more than 70% energy-saving than high-pressure sodium lamps.

The above content is provided by WOSEN. WOSEN is a professional manufacturer and supplier of Led Flood Light, Led Street Light, Led Solar Light, etc. For more information, please visit https://www.wosenled.com/ or contact admin@wosenled.com or WhatsApp +86-13425434349