Which Light Source is Best For Solar powered street lamp?

Nowadays, the development trend of solar powered street lamps is very rapid, and solar powered street lamps have replaced traditional street lights in many places. On the one hand, solar powered street lamps save money and trouble. On the other hand, solar powered street lamps are energy-saving and environmentally friendly. So which light source is the best for solar powered street lamps? After all, as an outdoor lighting system, people are most concerned about the lighting effect of the street lamps. In this article, we will introduce the light sources of solar powered street lamps in details.

Solar powered street lamp is composed of light source (including drive), solar panel, battery (including battery incubator), controller, street light pole and other parts. The selection of the light source plays a key role for solar powered street lamps. Now there are fewer light sources dedicated to solar powered street lamps. In order to save energy, it is necessary to choose DC light sources as much as possible. Common DC light sources now include energy-saving lamps, induction lamps, low-pressure sodium lamps and LED light sources.

1. Low-pressure sodium lamp

Compared with some common light sources, low-pressure sodium lamps can save more than 50% of electricity at the same luminous flux and illuminance. Its radiation spectrum is pure, stable and free of stray light. Coupled with high-quality electronic ballasts, it makes the low-pressure sodium lamp easier to use under various power conditions, especially suitable in special environments such as plateaus and cold areas.

2. Energy-saving lamps

Energy-saving lamps are characterized by low current, which can greatly extend the discharge time of the battery.

3. Induction lamp

Since its starting voltage and current are basically the same as the normal working voltage and current, it is especially suitable for the use of solar power street lamps and is a new type of light source specially developed for solar systems. Because there is no filament in the bulb body.

4. LEDs

LED is known as the fourth-generation lighting source or green light source, which has the characteristics of energy saving, environmental protection, long lifespan, and small size. It is a semiconductor that can convert electrical energy into light energy. It changes the principle of tungsten filament luminescence for incandescent lamps and tri-color powder luminescence for energy-saving lamps, and electroluminescence is adopted. Almost all the spectrum of white light LED is concentrated in the visible light frequency band, which greatly improves the luminous efficiency.

The above four light sources have their own advantages and disadvantages. LEDs are currently a common light source for solar led street lights. Solar powered street lamps are different from ordinary street lights in that they use solar energy as the only power source. At present, the cost of solar cell modules is relatively high, so in order to reduce system costs, high-efficiency light sources must be used. In recent years, LED technology has made key breakthroughs, and its cost performance has also been greatly improved. Compared with traditional street light sources, LED light sources have high luminous efficiency, which is close to twice that of incandescent lamps, and have a long service life; traditional light sources consume more power, and most of them work under high pressure, and the boost inverter link reduces energy.  The LED uses low-voltage DC power supply, which is safe and low in light source control costs.

The selection principle of the solar powered street lamp is to choose a suitable light source for the environmental requirements, high luminous efficiency, and long life. At the same time, in order to improve the efficiency of solar power generation, try to choose a DC light source to avoid power loss due to inverters.