Low pressure sodium lamp is the best light source for solar street lighting system
The low-pressure sodium lamp emits monochromatic light with wavelengths of 589.0 nm and 589.6 nm. The two yellow lines are located close to the green line of the human eye with the most sensitive wavelength of 555.0 nm, which has high luminous efficiency and is in the human eye. It does not produce chromatic aberration, so it has high resolution and good contrast. It is suitable for places with high visibility and color rendering requirements such as roads, viaducts, tunnels and intersections. The low pressure sodium lamp is also not dazzling. The low-pressure sodium lamp has a luminous efficiency of up to 200 lm/W, which is the light source with the highest light efficiency in the electric light source, and has the longest life.
Low pressure sodium lamp has high luminous efficiency
Luminous efficiency is referred to as light efficiency. It is the ratio of the luminous flux emitted by an electric light source to its electrical power, in lumens per watt (lm/W), which is the most important technical parameter for evaluating the electrical efficiency of an electric light source. Luminous flux refers to the amount of light radiation per unit time, expressed in lumens. The greater the luminous flux emitted by the light source unit, the higher the efficiency of the energy conversion light energy, that is, the higher the light efficiency.
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