Release date: 2018-04-27 Source: Lighting industry information sharing: 
How much do you know about the type of solar street light source? Let's take a look!
1, low pressure sodium lamp
Compared with some common light sources, low-pressure sodium lamps can save more than 50% of the low-pressure sodium lamps in the same luminous flux and illumination. Since the light-emitting tube of the low-pressure sodium lamp is sealed in a glass case with a high vacuum and coated with an infrared reflecting film, its luminous power is not controlled by the ambient temperature, and its radiation spectrum is simple, stable, and stray-free, and the light of the wavelength is Strong fogging, coupled with high-quality electronic ballasts, makes low-pressure sodium lamps easier to use under a variety of power conditions, especially suitable for solar street lights in special lighting areas such as tunnel lighting and high altitude cold.
2, high pressure sodium lamp
Unlike low-pressure sodium lamps, high-pressure sodium lamps are DC 24V (12V) input to electronic ballasts, output low-frequency (or high-frequency) supply bulbs, and high-voltage pulse-initiated lamps. Because it is an electronic ballast lighting, the life of the bulb is greatly beneficial, and the life of the bulb can be improved by more than 30%.
3, metal halide lamp
The biggest feature of the metal halide lamp is that the luminous power is particularly high, and the luminous efficiency is as high as 80 to 90 Lm/W. When the light is normally emitted, the heat generation is reduced. Since the spectrum of the metal halide lamp is based on the continuous spectrum and the line spectrum is covered, the color rendering index is particularly high, that is, the color reduction effect is excellent, and can reach more than 90%. In addition, the color temperature of the metal halide lamp is high, up to 5000 to 6000K. Because of its high brightness and small volume, metal halide lamps have a relatively short life, generally 2000h to 18000h. The shortcoming of the metal halide lamp is that it is difficult to initiate, and the low-power metal halide lamp is more difficult to launch.
4, LED lights
LED is called the fourth generation of illumination source or green light source, which is characterized by energy saving, environmental protection, long life and small size. It is a kind of semiconductor that can convert electric energy into light energy. It changes the principle of incandescent lamp tungsten light emission and energy-saving lamp three-base color powder illumination, and selects electric field illumination. The spectrum of white LEDs is all concentrated in the visible light range, and its luminous power can exceed 150 lm/W (2010). Comparing LED with general incandescent lamp, spiral energy-saving lamp and T5 trichromatic fluorescent lamp, the effect is obvious: the general incandescent lamp has a luminous efficiency of 12lm/W, the lifespan is less than 2000 hours, and the spiral energy-saving lamp has a luminous efficiency of 60lm/W. The number is less than 8000 hours, the T5 fluorescent lamp is 96lm/W, the life is about 10000 hours, and the white light LED with a diameter of 5mm can theoretically exceed 150lm/W and the life can be more than 100000 hours.
5, induction lamp
Because it initiates the same voltage, current and normal operating voltage and current, it is especially suitable for the application of solar street lamps. It is a new type of light source specially developed for solar energy systems. Since there is no filament in the bulb, it has a very long service life and can last up to 80,000 hours. In addition, since the luminescent coating of the bulb is a three-base toner, the luminescence is soft and the glare is greatly reduced. High-frequency plasma electrodeless lamps can directly save electricity costs by using other lamps, even 20%-30% lower than energy-saving lamps. High-frequency electrodeless discharge lamps are not required or less maintenance, have high reliability, and have a service life of up to 80,000 hours.
6, energy-saving lamps
The energy-saving lamp is characterized by a small current, which can greatly extend the discharge time of the battery. Light efficiency 40LM/W. Color temperature 2700K, 4000K, 64000K, color separation, red, green, blue, etc., life 6000H. Rated voltage DC12V, DC24V, voltage planning: DC10.8V--DC14.4V, DC22V-DC28V. Specifications: 3W, 5W, 7W, 9W, 11W, 13W, 15W, 18W, 20W, 24W, 26W, 30W, 40W, 45W, 65W, etc.
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