How many watts is suitable for college students to use LED desk lamps?

Everyone's eyesight and adaptability to light are different, depending on each person's needs.

It's like a computer, some people turn it up and some people dim it for the same reason.

The luminous efficiency of LED is 10-12 times that of incandescent lamps, and it uses direct current, unlike direct AC lamps, which makes the light it emits brighter, smoother and closer to natural light. However, because this kind of lamp has just started, this is a big cake, many bad manufacturers are shoddy, win by price, and the cheap lamps made of inferior LED are full of market, and customers who are not very knowledgeable are often fooled. It is difficult to identify new lamps and lanterns, but there are certain rules to follow, because the production process of LED determines the size of the manufacturer, the requirements for the production of a few W are low, and many small workshops cut corners to shoddy, so that the cost is very low, only 1-2 points of a LED, most of the small lamp beads on the market are like this, and the requirements for high power are very high, very formal, and manufacturers disdain to compete with small workshops, so the vast majority of high-power LEDs of 1W and above are qualified, The finished lamps on the market are mostly small for cost considerations, the intuitive feeling is that the new lamp is very bright and bright, but the nominal power is very small, but it is not known that after a few months due to the serious light decay, the brightness will drop significantly, but it is not compared with the new lamp and can not be felt, but the damage to the eyes is real, sometimes there are a few grains and even do not light up, so we must choose the lamp made of high-power LED, the judgment is also very simple, use dozens of LEDs, the total power is only 2-4W is likely to be problematic, And only 1-6 LEDs are used, and the total power is 6-8W is good.

1. Use 30 50 watt LED lights in the living room; 15W LED lights are all you need in the bedroom. LED lamps can replace spiral incandescent lamps or energy-saving bulbs from 5 to 40 watts, low power incandescent lamps, to 60 watts (requiring only about 7 watts of electricity).

2. A 13-watt bulb is about the same as the luminosity of a 100-watt incandescent lamp. (The average incandescent light is about 14 to 17 lumens watts, depending on the size and voltage.) According to the EU standard, an "energy-saving bulb" equivalent to a 60-watt thermal incandescent lamp must be able to output at least 806 lumens).

The international standard for desk lighting design for office and study is 300-500 lux (lx). The general power of 3W-4W LED, under the condition that the luminous part of the desk lamp is 350-400mm away from the desktop, the illumination of the desktop can reach more than 500lx. Therefore, it is best to use 3W-4W LED for table lamps.

White LED bulbs for household use are generally 15 watts, there are also brighter models, such as 20 and 25 watts. However, the brightness of the sedan cavity and the closed sail ridge may cause damage to vision, so it is necessary to avoid using too bright bulbs for a long time.

Household LED bulbs are generally recommended to choose such as 5-10 watts of Zheng egg, which can not only meet the lighting needs, but also save energy. The specific number of watts to choose should be determined according to factors such as the size of the room, the slag clump, and the need for light brightness.

5 watts is enough for a bedside lamp. 10 tiles on the roof is enough. 2o watts are enough for the living room.

Generally, 5-10w is fine.

The table lamp is based on LED (light

emitting

LED is a solid-state semiconductor device that can directly convert electricity into light. It is the third generation of lighting technology after incandescent lamps and fluorescent lamps, with the characteristics of energy saving, environmental protection, safety and reliability, and the solid-state light source is a new light source with great potential to replace traditional lighting appliances in the next ten years, representing the future of lighting technology.

2.The visual lighting environment for home reading and writing homework is very important, and the most important thing when reading and writing at home is to learn the visual lighting environment, specifically to learn the quality of the desk lamp. There are many varieties of learning desk lamps on the market, including eye protection lamps, energy-saving lamps, incandescent lamps and.

LED lights, etc. Judging the quality of the learning desk lamp, if the light color is white and dazzling, or the light color is dim, the illumination is not standardized, it is not suitable as a home learning light source, because that will have a negative impact on the development of vision.

3.If you want to use LED lamps as study lamps, you can refer to the following:

1) National certification requirements: the learning desk lamp must pass the national compulsory 3C certification and be within the validity period;

2) Warm white light source: color temperature 3200-3400K, from the perspective of visual physiology, warm white light source is the most in line with the visual physiological needs of the human eye;

3) Intuitive table lamp: the light should not be directly or refracted to the eyes, and the glare should be strictly eliminated. Here's how to do it:

When the height of the eye is 400mm from the reading and writing desktop and the horizontal distance from the center of the lamp source is 600mm, the direct or refracted light in the lampshade of the desk lamp should not be visible;

4) Detection of the illumination intensity of the table lamp: the illumination of the center of the light source from the height of 400mm from the reading and writing desktop is 750-1000

lx is the best visual light environment;

5) Simple test of clarity and color reproduction: stretch out the palm of the hand, palm up, and place it 30 cm under the lamp light, if the palm texture is clear and the palm fingers are ruddy, it means that the table lamp has clear color and good color reproduction; On the contrary, if it is blurry, the color is dark yellow, and the gray and white light line is poor. The clarity of table lamps with a color rendering index of more than 90 is much higher than that of ordinary color developing table lamps that account for more than 95% of the market share;

6) The learning desk lamp should have a certain height, at this time, the light irradiation surface is large, the light is uniform, and the illumination at 40 cm from the desktop should not be less than 750

lx；The table lamp bracket should also have a certain length, which is easy to stretch and shrink, and is suitable for computer operation, drawing and calligraphy, and learning to play the piano.

LED lights cannot be used for close-up reading and writing work, because the blue light, a short-wave, high-energy light source emitted by LED lights, can directly penetrate the cornea and lens, and can reach the macular area, causing burns to the retina of the human eye.

Desk lamps with direct current are preferred, because traditional 220V alternating current will leave 50 Hz of current fluctuation, which will cause the light to flicker. Strobe can easily cause eye strain, decreased vision, and deepened myopia. There is also a light source that prefers yellow light, which is a warm color, warm and comfortable, stable and not dazzling.

Then there is to see if there is radiation ultraviolet rays.

Kangluyuan 24V DC incandescent lamp reading and writing desk lamp, China's first DC incandescent reading and writing desk lamp, designed and manufactured in strict accordance with the national reading and writing desk lamp standard, Chinese patent, doctoral research and development, no radiation, 0 strobe, no blue light, color rendering index up to 100RA, color temperature 2800K, the most comfortable, stable, equivalent to about 40 minutes after sunrise sunlight, easy for the eyes to accept, care for children's eyes.

Regular household LED learning desk lamp 5-6W, that is the use of high-power LED, LED rechargeable desk lamp is the use of 20-30 small straw hat head LED with very high luminous efficiency, power consumption is provincial, but the light decay is also great, the life is not long, the power is generally about 2W, the new is very bright, it will be significantly darkened after half a year, and it will be scrapped in 2 years at most (even if the LED is not completely extinguished, but the battery is broken, and it cannot be charged).

From my experience with LED lights, 1 watt to 3 watts is fine. The range is so large because the quality of LED chips is uneven, and it depends on what quality it is.