I have heard the saying “LED lamps have a short life and cost electricity” more than once, and I really believe it when I hear it more. So much so that I always thought that “LED lights” were the product of capital, and even not as good as incandescent lamps of those years.
Until I met a friend who sold LED lights a few days ago, under his explanation, I understood: it turns out that it is not that LEDs are bad, but that many people have misunderstandings about LEDs. In his words, there are not a few “rumor-basking consumers” like me.
In that case, I will share with you a few questions I think he asked, hoping that everyone can look at the LED objectively.
Do LEDs last less than incandescent lamps?
The life of incandescent lamps is only 1000 hours; The life of energy-saving lamps is generally 3000~8000 hours according to the different phosphors; The life of LED lamps can reach 100,000 hours.
Therefore, “long life of LED lights” is undoubted. So why are the LED lights in someone’s home so easy to break? There are two main reasons:
** (1) LED is a low-voltage, DC emitter, so it cannot be directly connected to the wire at home like an incandescent lamp, and a drive power supply needs to be connected first. **The service life of the drive power supply is 10,000 to 80,000 hours (quality related). So many times “the light is broken”, not that the LED luminous body is broken, but that the drive power inside is broken, and the drive power can be repaired by replacing it.
** (2) LED lights are most afraid of high temperature and humidity, and in the home environment, these two situations are the most easily encountered. ** Light strips hidden in suspended ceilings, lamps that are turned on for a long time, and lights on kitchen and bathroom balconies are all exposed to high temperature and humidity. In this environment, the service life of LED lamps will be greatly reduced, and sometimes it is not even as durable as energy-saving lamps or incandescent lamps.
Are LED lights really energy efficient?
First of all, we need to understand what is called “energy saving”: lamps convert electrical energy into light energy. The more light energy is converted into a kilowatt-hour, the more energy efficient it is.
**The conversion efficiency of incandescent lamps is 15%, that is, 1 part of electricity is consumed, which can be converted into 0.15 parts of light; the conversion efficiency of energy-saving lamps is 32%; The conversion efficiency of LED lights is 90%. So there is no doubt that LED lights are the most energy efficient.
There is also a side that proves that LED lights are the most energy-efficient: electrical energy that is not converted into light is converted into heat. Therefore, after turning on for a period of time, the surface of the incandescent lamp can burn people; The surface of the energy-saving lamp is warm; The surface temperature of the LED lamp hardly changes.
This proves that LED lights convert only a small part of the heat.
Why is the electricity bill of LED lights not less?
This continues to explain “energy saving”: in fact, not only LED lights, but also all home appliances. ** Energy saving, not equal power saving. **
Energy saving, which refers to achieving the same brightness, LED lights consume less power; Conversely, consuming the same electricity bill, LED lights are brighter.
The key now is: the lights in our house are so bright! **
When I used incandescent lamps, I felt “so bright” when I had a 60W lamp at home! Now you go and look at the 60W incandescent lamp, which is almost like candlelight.
Now at night, we can’t wait to make our rooms as bright as day. The power of LED lamps is often hundreds of watts, and the power consumption will naturally increase – but think about it the other way, if you change to an incandescent lamp of the same brightness, it will only consume more power than it is now!
Is yellow light brighter than white light?
Wrong!
“Yellow light” and “white light” refer to the color temperature of the light; “Bright” refers to brightness.
First of all, brightness: the brightness of the lamp is related to two factors –
(1) The material, LED lamp, is brighter than incandescent lamp;
(2) Power, 60W LED light, is brighter than 30W LED light.
There are energy-saving lamps installed at home, and if you don’t feel bright enough, you can try to change to an LED lamp of the same power.If you install LED lights or feel that they are not bright enough, then try to change to a more powerful LED light.
Color temperature, refers to the color of light, you can first look at the spectrum▽
The smaller the color temperature, the redder and yellowish the light color. But note that color temperature has nothing to do with brightness. For LED lights of the same power, the brightness of yellow light and white light is the same.
So why do some people think that “yellow light is dark”? There are two possible causes:
**(1). The color of incandescent light and candlelight is yellow, and the brightness is also very low. Therefore, many people, subconsciously, equate “yellow light” with “darkness”.
** (2) In a low color temperature environment, people are more likely to feel tired, lazy, and more likely to make people drowsy. **In a dim environment, people will feel the same way. Therefore, “low color temperature” and “dim environment” are equated.
It is precisely because of this that it is recommended that everyone use white light in the living room, study and other work, study and entertainment environments. In the bedroom, which requires rest, use yellow light.
