Choosing a lamp is not a difficult task, but if the problem is changed to choosing a lamp for children, it is estimated that many people will be stumped. Children’s eyes are still more sensitive than adults, and it’s still not easy to buy a lamp in the grass, so eye protection is still a top priority for children’s table lamps.
So the question is, how to choose a table lamp for eye protection? There are a lot of table lamp products on the market, ranging from dozens to hundreds, which is the right eye protection table lamp? In fact, we have extracted the most critical light source and talked clearly, it is not difficult to choose eye protection table lamp.
At present, most of the lamps used in the market are mainly these three types: incandescent lamps (halogen lamps), energy-saving lamps and LED lamps. The advantages and disadvantages of these three lamps are also different. Let’s analyze them one by one.
Explanation of several key parameters
Color rendering index: The color rendering index refers to the color rendering ability of the light source to the object. We generally use sunlight as a reference, and its color rendering index is 100. The higher the color rendering index of the light source, the closer the color reproduction ability to the sunlight. The more we look at other objects under this light source, the more we feel its natural color.
Color temperature: In general, the color temperature of the light source is the warm and cold color of the light source. You can also have a reference when choosing a lamp. In daily life, the color temperature of daylight is about 6500K. The color temperature of incandescent lamps cannot be changed due to the problem of light emission. Its color temperature is: 2700K. (The color temperature has a special introduction in the previous article, see: https://www.wonderful-lighting.com/2019/11/04/led-color-temperature-knowledge-popularization/)
Stroboscopic: Stroboscopic refers to the phenomenon of the flicker of the lighting source. In fact, the current mainstream energy-saving lamps and LED lights basically avoid the problem of stroboscopic in principle, so don’t worry too much. (The previous article about stroboscopic issues is also introduced, see: https://www.wonderful-lighting.com/2020/04/27/why-do-leds-have-strobes-how-to-reduce-strobe /)
Incandescent lamps: the advantages and disadvantages are equally prominent
Although the incandescent lamp’s light is a little yellow (low color temperature), it does not affect it as the closest artificial light source to sunlight. The color rendering of incandescent lamps is very good, it can restore the true color of the object very well, and the color rendering effect of sunlight is very close.
Secondly, the incandescent lamp emits light by heat, and the filament has a certain inertia after being reflected, so the stroboscopic problem is very light, and it will not be noticed when the power grid is stable. It can be said to be an ideal reading lamp.
However, the photoelectric conversion efficiency of the incandescent lamp is low, it costs electricity, and the life is too short. Although the upgraded halogen lamp improves the life problem, it still cannot be compared with the following two players.
Although incandescent lamps have been gradually eliminated, but do not mind its shortcomings, incandescent lamps are still very good reading lamps. It is recommended to buy halogen lamps with thick filaments and tungsten halogen circulation, which can further reduce the strobe. It is worth noting that point light sources are easy The brightness of the foreground and background is quite different, so do not use the incandescent lamp alone. The brightness of the surrounding environment should not be too low.
Advantages: The best color rendering, the closest to the sun, no stroboscopic.
Disadvantages: electricity, heat, short life, point light source.
Eye protection index: better.
Energy-saving lamps: cost-effective, color temperature is a flaw
The energy-saving lamps here refer specifically to CFL compact fluorescent lamps (some energy-saving lamps are found under the keywords of LED light sources). Due to the afterglow effect, the fluorescent powder of compact fluorescent lamps can also be ignored and does not irritate the eyes. And its photoelectric conversion efficiency is high, it is much more energy-saving than incandescent lamps, and its life is longer than the former.
However, the color rendering of compact fluorescent lamps is relatively poor, and products using three-primary phosphors will be better, but the color temperature of such lamps is often only 2700K and 6500K, either too yellow or too cold, not very suitable for reading. And it is full of mercury vapor. It is still a bit dangerous if broken. If children use it, the safety may be almost. Please pay attention to it.
Advantages: no strobe, energy saving, longer life than incandescent lamp.
Disadvantages: security is slightly worse, color rendering is general.
Eye protection index: poor.
LED lights: the price is expensive, but the best experience is selected
As a star lighting source, the advantages of LED lights can be said to be many: small size, very energy-saving, and super long life. In theory, it can also eliminate stroboscopic, and the LED spectrum is continuous, and high-quality products can be very good. Color rendering index (above 95).
And the color temperature of LED is mostly between 4000K and 6000K. The light source in this area is also very suitable for reading.
However, at present, LED table lamps are mixed with dragons and snakes, and the inferior products have become obvious due to the cut-off of the power circuit part.
Therefore, if you want to buy LED table lamps, you can’t be greedy for cheap, and you should consider the price on the basis of excellent quality.
Advantages: good color rendering, energy saving, very long life, no stroboscopic (high-quality products).
Disadvantages: high prices.
Eye protection index: the best.
Summary: In a nutshell, if the color rendering requirements are high, and you don’t mind the life of electricity bills, then incandescent lamps, especially halogen lamps, will be a good choice. But from the perspective of environmental protection, high-quality LED lights will be better.
At present, the relevant regulations on the market require that the indicator of the LED lamp should be above 80. Under this regulation, the human eye can already distinguish the color of the object very easily. The problem that the low indicator finger causes the eye to struggle to distinguish the color of the object can basically be ignored. The LED lamp is being solved. In the case of stroboscopic problems, it is the best choice for eye protection.
Tips: The eye protection lamp is only to reduce the damage to the eyes caused by external factors. In fact, the most important thing is to take regular breaks. A proper 15-minute break after half an hour of work or writing is the best way to protect your eyes. If you use your eyes too much, even the best lamp will not help, and solving the problem from the root is the key.