Le Gang: Views on "Is LED suitable for desk lamp"

Many people have consulted us about the issue of LEDs in the end. Since I have been rooted in the lighting business since the beginning of the university, many people ask directly for the child's vision and health. As far as I can buy a table lamp that I often buy from the market: the table lamp for non-learning reading, from the perspective of energy saving, LEDs certainly don't have to say, but if it is a desk lamp chosen for long-term reading and learning, from the judgment of the comprehensive health lighting index, if it is not made, if you want to buy a perfect, you really have to spend a lot of effort and money. Just like after the light source revolution, the old generation of light source products will not be completely eliminated because of some special excellent parameters. At present, LEDs as a desk lamp source will not win all non-LED sources.

LED table lamps are overwhelming in the market, but the quality is still uneven. A common problem is that because many of these lamps use low-power LEDs as light sources, their total power is insufficient to achieve sufficient illumination. It has no effect on eye hygiene, depending on its function. If it is used as a bedside lamp or a night light, the control requirements are not high, and the impact may be small. However, if used as a reading lamp, insufficient illumination will accelerate visual fatigue and is not conducive to protecting vision.

Secondly, the white LEDs used in most LED lamps are based on the principle that the blue chip is coated with phosphor, the blue light of the chip excites the phosphor to emit yellow-green light, and the yellow-green light and blue light are combined. Because of the lack of red light, the color temperature It is too high, and some far exceeds the appropriate color temperature range for indoor lighting. Of course, the damage of the LED blue spectrum to the eyes when the table lamp is used at a close distance also needs to be protected!

In addition, due to the small size and high brightness of the LED light source, the anti-glare measures for the LED desk lamp are also relatively high. If you do not carefully choose the angle of light, take anti-glare measures such as grille, lens, etc., it may produce direct glare, which not only produces glare, but also reduces visual function, which is not conducive to reading.

I mainly choose the following books, whether or not I choose LED light source, the more lights below the standard, the more I think it is a good table lamp:

1. National certification requirements: Learning lamps must pass the national mandatory 3C certification, and within the validity period;

2, using a warm white light source: color temperature 3200-3400K, from the visual physiology, warm white light source most in line with the human eye visual physiology needs;

3, intuitive table lamp: light can not directly or refract the eyes, strictly eliminate glare. The simple test method is as follows: when the height of the eye is 400mm from the reading and writing tabletop and the horizontal distance from the center of the desk lamp source is 600mm, the direct or refracted light in the lampshade should not be visible;