High power LED to white light in the future demand will reach 300 million stars

High power LED to white light in the future demand will reach 300 million stars

Discovery
The device is applied to the LED street lights, technology at the special requirements mainly embodied in the following two aspects: first, the good luminous efficiency, not too fast. The attenuation stability Second, light color consistency and can better effect, can't because of the used for long time white light color change. The two were required to the overall better heat lamps and lanterns, optical design to reach the designated position.

With the common LED street lights high-pressure sodium lamp compared advantages as follows:

First, the energy conservation: at present the luminous efficiency white LED about 80 lm/W, a traditional high-pressure sodium lamp can power saving 50 ~ 60, along with the rapid ascension, LED efficiency semiconductor in energy saving lamps showed great potential.

Second, low maintenance costs: at the current technical level and test results calculated, high power LED light source can normal use 10 years without replacement, and traditional high pressure sodium average one and a half years should be replaced once, to use a light source can greatly reduce maintenance costs.

Third, show color sex better: LED colour developing index of high (75 ~ 80), the reaction speed, the road looks more bright, feel more comfortable, driving workers also feel more secure. And high-pressure sodium lamp spectrum narrow, show color sexual difference (20 to 40), feel the gloom.

The shortcomings of the main as follows:

First, the luminous efficiency is not tall enough: at present although LABS high-power level white LED the luminous efficiency of more than 100 lm/W, but mass production, higher ratio of high power LED efficiency of white light in 60 lm/W or so, energy advantage is not a full play.

Second, in the face of LED light reflectivity low: because the present white LED spectral features, road surface and the surrounding objects to the reflectivity low, so the brightness is low, and sodium lamp, this is it compared to what a weakness.

High power LED light source of the current white light the luminous efficiency is still in about 70 lm/W ~ 80 lm/W stage, the luminous efficiency theory can achieve 300 lm/W or so, so in technology and very big development space. At the same time semiconductor street light source is currently in the early stages of the industrial development, improve the cooling efficiency, driving control system optimization, with light design there are very large space, and the promotion of research and development work needs to be further developed. At present a lamp that LED street lights need an average of 100-or-1 W white LED to the street lamp needs a year 3 million light to calculate every year to white light, the demand of high power LED will reach 300 million stars.

Related reading:
Previous:Heat and reliability is LED street light popularity impact
next article:Standards in the street can't LED comprehensive promotion
Directory page:LED Information
Return top