Incandescent lamps, energy-saving lamps and LED lamps, who is better?
Choosing a desk lamp was not a difficult task, but if the problem is changed to choosing a desk 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.
Then the question is coming, how to choose a table lamp for eye protection? There are a wide range 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 the 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.
Colour temperature: The color temperature of the light source is generally the color temperature of the light source. You can simply judge the color temperature level and the color temperature level through the following figure. You can also have a reference when choosing lamps.
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.
Incandescent lamp: the advantages and disadvantages are equally outstanding
Although the incandescent light is a little yellow (low color temperature), it does not affect it as the artificial light source closest to the sun. 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 the light is 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 incandescent lamps is low, it consumes 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 phased out, 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 halogen tungsten 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 the incandescent lamp should not be used alone, and the brightness of the surrounding environment should not be too low.
Advantages: The color rendering is the best, and it is closest to the sun, without flicker.
Disadvantages: electricity, heat, short life, point light source.
Eye protection index: better.
Energy-saving lamps: cost-effective, color temperature is hard
The energy-saving lamps here refer specifically to CFL compact fluorescent lamps (some of the energy-saving lamps searched for keywords are 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. Moreover, 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. In addition, it is full of mercury vapor. It is still a bit dangerous if broken. If children use it, the safety may be almost. You should pay attention to it.
Advantages: no strobe, energy saving, longer life than incandescent lamp.
Disadvantages: security is slightly worse, color rendering is average.
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 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).
It's just that at present, LED table lamps are mixed with dragons and snakes, and the inferior products due to the power circuit part cut corners make the strobe of LED lights obvious.
So if you want to buy LED table lamps, you can not choose products that are too low in price. It is recommended to buy products from well-known big manufacturers for more protection.
Advantages: good color rendering, energy saving, very long life, no stroboscopic (high-quality products).
Disadvantages: high prices.
Eye protection index: the best.
To sum up, if high color rendering is required and you don’t mind the life of electricity, 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. Although energy-saving lamps are cost-effective, they are not recommended as eye protection lamps.