At present, most work or study has to be done at night, so a light that can focus a lighting shade on the book or device you’re working on is prevalent these days. As for desk lamp, LED desk lights become the first choice of most people instead of incandescent light or halogen lamp because of high illuminance and fewer eye harms as advertised. Though they know reading or working on computer for a long time under dim light is easy to make eyes discomfort and even red or fatigued, people are also concerned about a question whether the LED desk lamp can cause eye problems. Actually, whether LED desk light is bad or good for your eyes depends on what LED light you have and how you use it.
A real high quality LED desk light itself is not harmful to your eyes
There are many LED desk light manufacturers in the market and claim that their LED desk lamps are eye-protective. A real good eye-protective LED desk light should be equipped with the following features:
1. No flash or flicker;
2. No infrared ray or ultraviolet ray;
3. No electronic wave or radiation interference.
To judge a LED desk lamp whether it is good or poor, you also need to consider some other factors including spectrums, color rendering index, illumance and color temperature. You can find those parameters in a product specification.
Though you may choose a desk light that should be eye-protective, some people are also afraind of using LED light because LED eye-protective lamp is related to blue-ray technology. The blue-ray belongs to Optical Damage. In fact, retina light adaptability is poor when blue ray is within 400-500mm but become 2~3 times stronger when blue ray is within 450`480mm. LED peak spectral emission commonly ranges from 450mm to 480mm. therefore, the LED light is not harmful to your eyes as long as it works normally.
Among so many LED lights, you should first of all choose a real eye-protective LED desk lamp.
Use it properly to avoid potential harms
LED desk lamps are widely used not only for businessmen but for students. It is harmful to read or work under a lighting shade which is too bright or too dim. The illuminance is up to the light itself but also related to the way you use it. Many people become confused that sometimes eyes become red or fatigue after all day long learning or working though they’re using a real eye-protective light. That is because they’re using it in improper way. So, how to use a LED light properly and protect your eyes?
1. Placement of the light
When you’re about to reading or working on computer, you’d better put it in front left of the table for fear that your right hand blocks the lighting.
2. Light types
You should choose a suitable lamp type that won’t flood light directly to the eyes. You can fix the light in a right view or buy one with an extra light cover.
3. Keep background light on
Some people prefer to turn other lights off when starting using LED light for reading or working, but that will make illuminance difference greater between desk light and background light, which will invoke larger pupillary constriction and make eyes tired, even short-eyesight.
4. Avoid glare of computer screen
If you have to work on computer, you’d better let the desk light illuminate the computer screen forward and backward to supply enough lighting for your eyes. Besides, don’t sit back to the window. The sunlight will exposure to the screen and reflect to your eyes, which will be bad for the eyes.
No matter you have to spend much time working on computer or learning at night, a real high quality LED light can protect your eyes from red or fatigue. But your improper usage of desk lamp will also be harmful to your eyes. So, you should choose a high quality LED desk light that can really protect your eyes and use it properly.