How about LED lamps
LED lamps, also known as LED lamps, refer to appliances that can transmit light, distribute and change the light distribution of LED light sources, including all parts and components required for fixing and protecting LED light sources except LED light sources, as well as line accessories necessary for connection with power supply. LED lamps and lanterns are becoming the main products of the new generation lighting market with their technical characteristics of high efficiency, energy saving, long life and small size, and effectively driving the rapid development of environmental protection and energy conservation industry
What is led lamp
LED lamps, also known as LED lamps, can transmit light, distribute and change the distribution of LED light sources. The basic structure of LED lamp is semiconductor material chip, which has good seismic performance. It has the characteristics of high efficiency, energy saving, safety, long life and small size
What is the best choice of lighting fixtures in school classrooms
Although I am a professional, I still want to answer the question of choosing lighting fixtures in the classroom with the help of standard documents:
In 2004, the Ministry of Construction issued a new standard for lighting design of buildings GB50034-2004. The standard makes the following relevant provisions for classroom lighting:
1. Desk illumination 300lx; Blackboard illumination 500lx
2. Illumination uniformity minimum illumination / average illumination 0.7
3. The unified glare value UGR shall not be higher than 19
4. The shading angle of direct lamps shall not be less than 15 ? and the average brightness of the light source is 20-50kcd/m ?Hour
5. Power density value: current value 11w/m ? Target value 9w/m ?
6. It is advisable to use a straight tubular fluorescent lamp with a thin tube diameter
7. The relevant color temperature of the light source is 3300 ~ 5300k
In fact, many schools do not consider these problems at all when they decorate the classroom lighting, but simply install a few light tubes, chandeliers and so on. Even more schools do not consider the blackboard lamp at all, let alone color temperature, illumination and so on
- [Suzhou sun lighting] I hope my answer is helpful to you. First, look at the lighting requirements of the classroom, and choose lamps according to the requirements
1 All classrooms should be equipped with artificial lighting
2 The average illuminance maintained on the desk of the classroom should not be less than 300lx. LX is the illuminance unit. 1LX is the illuminance with 1 lumen luminous flux evenly distributed over an area of 1 square meter. The illuminance uniformity should not be less than 0.7. The illuminance uniformity is the ratio of the minimum illuminance to the average illuminance on the specified surface
3 The blackboard in the classroom should be equipped with local lighting, which should maintain the average illumination. When the lighting device must be maintained, the average illumination on the specified surface should not be less than 500lx, and the uniformity of illumination should not be less than 0.8
4 In order to reduce the direct glare caused by the lighting source, the classroom should not be illuminated with naked lights. The minimum hanging height of the lamp from the desk top shall not be less than 1.7m. The arrangement of lamp tubes should adopt the arrangement that its long axis is perpendicular to the blackboard surface. For the step classroom, the front row should not produce direct glare to the students in the back row
5 Unified glare value of the classroom unified glare value is the psychological parameter of the subjective reaction of the light emitted by the lighting device in the visual environment to human eyes, which should not be greater than 19 according to the unified glare value formula
6 Under the condition of maintaining the average illumination value of 300lx, the current value of classroom lighting power density should not be higher than 11w/ ? and it should be lower than 9w/ ?in conditional areas
7 When calculating illuminance in lighting design, its maintenance coefficient should be taken as 0.8
8 The measurement method of classroom lighting shall be in accordance with gb/t 5700. In the face of a wide range of lighting fixtures on the market, LED lamps have become the best choice for school classroom lighting fixtures because of their high light source, softer light, no glare, green environmental protection, beautiful and concise appearance, and the role of adjusting the environment
Using LED lights in school classroom lighting is not only environmentally friendly, but also has the characteristics of long service life and no electromagnetic interference. It is very suitable for school classroom lighting occasions with high environmental requirements
There are many kinds of LED lamps. Don't be greedy for bargains when purchasing. Check the corresponding safety instructions built into the lamp products to describe the relevant marking contents of the products, and the specific installation, use and maintenance related safety information of the products. Choose led classroom light and led blackboard light for school classroom lighting ~ you can go to Qichen to have a look, and all indicators are better than national standards
Which kind of LED light should be selected for classroom, panel light or grille light
Classroom special LED lights must choose led classroom lights and led blackboard lights. Grille lights are better! The integrated LED grille lamp adopts front lighting, which has high luminous efficiency and low cost. It is the most ideal lighting for the office, and Haomei in Zhongshan sells best. The grille lamp in the classroom adopts the grille structure to prevent glare, with a low luminous efficiency of 56%. It is difficult to maintain, easy to accumulate dust, and the maintenance rate of illumination in the later stage is very poor
Microcrystalline anti glare structure anti glare, using the integrated micro prism anti glare plate, the light output efficiency is 90% high, easy to clean, more integrated, and more beautiful as a whole
In the LED panel lamp export data, the microcrystalline anti glare structure accounts for more than 99%, and the grid structure is basically not done. The internationally used design scheme of anti glare panel lamp is to use micro prism anti glare plate
Why are there grid structure products in the domestic market at present? Because the update speed of the national standard is slow, and the promotion time of some large manufacturers is early, designing LED products according to the fluorescent lamp classroom standard obviously does not conform to the market law, and there are many problems. The efficiency of lamps and lanterns is low, maintenance is difficult, and the maintenance rate of luminous flux is low, which cannot achieve the purpose of energy conservation
With the update of the national standard, more and more manufacturers have entered the education market. There are more and more microcrystalline anti glare structure classroom lights, which have gradually become the mainstream trend. It is only a matter of time to replace grille products, just like led ordinary panel lights replacing fluorescent light panels, this is the general trend
The most important thing of classroom lights is the later maintenance and luminous flux maintenance rate. The later maintenance of the grille structure is difficult. As time increases, the illumination of the desktop decreases significantly, which is easy to cause customer complaints