What is the difference between incandescent lamp, fluorescent lamp and LED lamp? Do LED lights really save electricity?

2021-04-23 08:48:16 lighting 1

Which is better, incandescent, fluorescent or LED? This problem seemed quite simple back then. It is obvious that incandescent lamps are inferior and LED lamps are better. However, some people have recently reversed the case for incandescent lamps, saying that "LED lamps do not save electricity" and "incandescent lamps have a long life." Today, let’s talk about the difference between these three types of lamps.

Some people say that LED lights save electricity, but it is not accurate. It should be said that LED lights are more efficient. High efficiency does not mean power saving. The answer is the same as the question of "60W LED lamp or 60W incandescent lamp is more power saving".

The wattage of the lamp determines its power consumption. Our pursuit of brightness today is getting higher and higher, and we can't wait to make the night brighter than the day. The total power of LED lights used in the home has reached more than 60W. So some people will complain that "changing the LED lamp will consume more electricity", because you change the lamp and increase the power at the same time.

The efficiency of LED lights is high, and the brightness is higher under the same power. To make the room bright as daylight, a 60W LED light is enough. If you change to an incandescent lamp, I'm afraid it will take a few hundred watts.

Incandescent lamps, fluorescent lamps (energy-saving lamps), and LED lamps all convert electrical energy into light energy. The conversion efficiency of incandescent lamp is about 15%; fluorescent lamp is about 50%; LED lamp is about 90%. The remaining electric energy is all converted into heat and wasted. So we see that the incandescent lamp heats up very seriously, and the LED lamp hardly generates heat.

The light we pursue is actually sunlight. We call sunlight "white light", and all lighting fixtures are pursuing white light-white, which is a kind of color temperature.

The greatness of LED lights is that they can produce a variety of color temperatures that we need, and the color temperature adjustment range is very wide. If you want yellow light, you can emit yellow light; if you want white light, you can emit white light; if you want blue light with a higher color temperature, it is not impossible.

As long as you want, you can buy LED lights with any color temperature between 2500K and 7500K.

The fluorescent lamp is much worse, its color temperature is mainly concentrated around 3000K. This kind of light is more accustomed to call it "warm white light", which is close to white light, but not white enough.

Incandescent lamps can only emit yellow light, and the color temperature is around 2500K. The light at this value is yellowish, only slightly whiter than candlelight.

Color temperature has a great influence on people's feelings. The whiter the light, the more energetic the person; the yellower the light, the dimmer the person. So we choose LED lights today. People will suggest that you install low color temperature in the bedroom and high color temperature in the living room. Just imagine, if we still only have a single color temperature incandescent lamp to choose from, then there will be no "996" in the company. Everyone will be drowsy at night.

The luminous body of the incandescent lamp is the tungsten wire inside. We can understand the tungsten wire as a rope. The tungsten filament also heats up during the process of luminescence, and the heat will be lost. One day the tungsten wire broke and the lamp broke. This structure is very simple, so the life expectancy can also be imagined-generally speaking, the theoretical life of an incandescent lamp is about 1000 hours.

Fluorescent lamps are a little better. They use high-pressure inert gas inside to cause molecules to move quickly to emit light. The theoretical life span is about 3000 hours.

The light-emitting principle of LED lights is more complicated, we don't need to know too much, just know that its theoretical life span is 100,000 hours.

From this point of view, it is not a problem to use an LED lamp for more than ten years. But some people say that the LED lights in their homes are broken every three to five times. Why is this?

This is because LED lights cannot be directly energized to emit light. It also requires a series of devices such as voltage transformation and voltage stabilization. These devices form a small box called "starter". No matter how long the life of the luminous body is, and the starter is broken, we also habitually think that it is "the lamp is broken."