From the previous incandescent lights to the later energy-saving lights, to the current LED lights, which light is better? What's the difference between these lights?
A long time ago, most of the household lighting used incandescent lights, and then more and more energy-saving lights were used. However, these lights have some shortcomings compared with the new LED lights, so now most of the household lighting uses LED lights. Let's first introduce the shortcomings of incandescent lights and energy-saving lights, and then introduce several new types of LED lighting.
1. Incandescent light
Since the invention of the incandescent light by American Edison in 1879, although it has been continuously improved, it still has many shortcomings. The filament life is generally only one or two thousand hours, and the luminous efficiency is not high, and only a small part of the power consumption is consumed. Converted to light energy, most of it is wasted in the form of heat energy.
▲ old-fashioned incandescent lights
This old-fashioned incandescent light consumes a lot of power and has low electricity-to-optical conversion efficiency, so it is less and less used for home lighting.
2. Energy-saving lights
Although such energy-saving lights and old-fashioned fluorescent lights have higher luminous efficiency than incandescent lights, there are still filaments in the lights, and mercury vapor is contained in the lights. The discarded old lights have an impact on the environment. In addition, this kind of energy-saving lights starts slowly in cold regions, and it takes a period of time to become brighter after lighting, so these kinds of energy-saving lights are not used much now.
3, all kinds of LED lighting
LED lighting saves power, has high electricity-to-optical conversion efficiency, beautiful appearance, and can be dimmed and changed at will. Therefore, more and more LED lights are used for household lighting.
▲ USB fluorescent light
The working voltage of this USB fluorescent light is 5V, which can be powered by the 5V voltage output by the mobile phone charger or power bank, which is suitable for students to use in the dormitory. With a little modification, it can also be used as a small LED desk light.
▲ LED UFO light.
This kind of light adopts metal aluminum shell to dissipate heat, and the power ranges from a few watts to dozens of watts, and the price is not expensive. Its luminous colors are white, yellow, warm white, etc., which are very suitable for home lighting. Generally, for a room of 10 square meters, the brightness of 18 watts is enough.
▲ LED bulb light.
The power and luminous color of LED bulbs are the same as the above-mentioned flying saucer lights, and there are also various specifications to choose from, which are suitable for home lighting. Generally, 3-9 watt LED bulbs can be used in corridors and bathrooms. By the way, some cheap LED bulbs now use low-cost resistance-capacitance step-down circuits, which have a high failure rate.
▲ LED candle light
The power of LED candle lights is generally only a few watts, and they are small in size, beautiful in appearance, and low in power consumption. They can be used as LED night lights.
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