1. Incandescent lamp

1. Working principle: Incandescent lamp is also called tungsten lamp. The manufacturer of led outdoor solar garden light is a solid-state cold light source, which has the characteristics of environmental protection, no pollution, low power consumption, high light efficiency, and long life. Therefore, led outdoor solar garden light will become a good choice for road lighting energy-saving transformation. led outdoor solar garden light It is a kind of high-efficiency solid-state light source based on semiconductor PN junction that can emit light with weak electric energy. Under a certain forward bias voltage and injection current, it injects holes in the P area and injects into the N area. After the electrons diffuse to the active area, they recombine by radiation to emit photons, which directly convert electrical energy into light energy. When current passes through the filament, a lot of heat is generated, making the temperature of the filament higher than 2000 degrees Celsius and in an incandescent state, so it is called an incandescent lamp. led outdoor solar garden light It is a kind of high-efficiency solid-state light source based on semiconductor PN junction that can emit light with weak electric energy. Under a certain forward bias voltage and injection current, it injects holes in the P area and injects into the N area. After the electrons diffuse to the active area, they recombine by radiation to emit photons, which directly convert electrical energy into light energy.

2. Advantages: The incandescent lamp is close to the sun, the color rendering index is as high as 99-100, and the price is low.

Disadvantages: Only about 10% of the electricity consumed by incandescent lamps can be converted into light energy, and the rest is lost in the form of heat energy, and the service life is usually not more than 1000 hours. Two words: energy saving and short life.

Abstract: Although incandescent lamps are cheap and good, they have high power consumption and short lifespan. Most of the electricity is used for heating, and their performance is far lower than that of the new generation of light sources. Therefore, it is required to gradually withdraw from the market.

2. Halogen lamp (commonly known as lamp cup, cup lamp, spotlight)

This kind of lamp cup is commonly used in most households.

1. Working principle: A variant of the incandescent lamp. The principle is to inject halogen gas such as iodine or bromine into the bulb. Under high temperature, the tungsten wire will sublimate and the halogen will react chemically. The cooled tungsten will re-solidify on the tungsten wire to form a balanced cycle , To avoid premature breakage of the tungsten wire. Therefore, halogen bulbs last longer than incandescent bulbs.

2. Advantages: close to the continuous spectrum of sunlight, good color rendering, color index above 95, and the price is relatively cheap. Small size, good lighting control, suitable for spotlights.

3. Disadvantages: Do not change the nature of the incandescent lamp, or heat and emit light, most of which will be lost due to heat, and the light conversion efficiency is not high. The life expectancy is increased to 2000-4000 hours, which is not bad.

Summary: Low price, good color rendering, small size, good light control, suitable for areas that need projection lighting, and higher requirements for the color reproduction of the subject.

3. Fluorescent lamp (commonly known as light stick)

Working principle: Fluorescent lamps are also called fluorescent lamps. The fluorescent lamp is filled with argon and a small amount of mercury, and the inner wall of the lamp is coated with phosphor powder. Fluorescent lamps emit ultraviolet light during gas discharge, and phosphors absorb ultraviolet light and emit visible light.

2. Advantages: **The efficiency of fluorescent lamps is higher than that of incandescent lamps.

three. Disadvantages: poor color rendering, especially early non-tri-color fluorescent lamps. Fluorescent lamps contain harmful elements such as mercury, which are harmful to the environment. In addition, ultraviolet rays and stroboscopic phenomena can also cause damage to human eyes.