Why is there a significant difference in brightness among solar energy-saving street lights with the same power output?

With the advancement of science and technology and the increasing awareness of energy conservation, in recent years, traditional street lights mainly using high-pressure sodium lamps in China have been converted to LED street lights. Solar energy-efficient street lights are green and energy-saving. They consume one-third of the energy of traditional street lights at the same brightness and are therefore favored by people. However, the quality of LED street lights on the market varies greatly. Different brightness levels can be found in solar energy-efficient street lights of the same power. What exactly causes this situation?

Solar street lights are composed of LED chips, lenses, power supplies, and drivers. Different manufacturers use different quality chips, lenses, and power supplies. At the same power level, high-quality LED street lights will undoubtedly have higher brightness. Let us delve into the factors affecting the brightness of solar energy-efficient street lights.

1. The Lumen Output of Solar Street Light Chips

The higher the lumen output of the solar energy-efficient street light chips, the higher the luminous efficiency and overall brightness of the LED street lights. Some street light manufacturers use low-lumen LED chips to maximize profit. Therefore, the brightness of LED street lights produced with high-lumen chips at the same power level will undoubtedly be one level lower. However, we generally use high-quality Philips LED chips for 1000-degree lighting, with a single lumen of 130 lumens per watt, resulting in the overall brightness of the fixture being higher than that of other manufacturers.

2. The Curvature of the Lenses in Solar Street Light Bulbs

The rounder the curvature of the bulb lens, the more light it reflects, resulting in higher brightness for the street lights. The solar street lights from Century Sunshine have a high light transmittance and very impressive brightness.

These are the two main reasons for the significant differences in brightness of solar courtyard lights at the same power. Therefore, we must pay attention to these two points when making a purchase.