Many people have a common misunderstanding when buying and using high brightness solar street lights, that is, judging the brightness only by wattage. In reality, the brightness of a solar street light is a complete optical system, not only depending on the wattage. To scientifically evaluate the lighting effect of a streetlight, one needs to know three core parameters, lumens, illuminance and luminous efficacy. Besides, it is also necessary to know the effects of hardware configuration, manufacturing process and usage environment on the brightness, in order to handle various outdoor lighting conditions accurately.
Lumens, a unit of measurement for the total luminous flux of a luminaire, refer to the total amount of light emitted by the luminaire and are a fundamental indicator for determining brightness. At present, the high brightness solar street lights all use high-efficiency LED light source. High quality solar street lights have a very high luminous efficiency compared with the outdated traditional sodium lamps. The luminous efficacy of the conventional solar street lights in the market can reach 160 lm/W and the high-quality industrial-grade luminaires can reach over 220 lm/W. The higher the luminous efficacy value of smart solar street lights with the same wattage, the higher the total lumens, the more prominent the luminous power, so that even with lower wattage, it can achieve high-brightness lighting.
Illuminance is the actual amount of light incident on a road surface and is measured in lux (lx). It is the basic criterion for the acceptance of the project and the daily use, which is very close to the real lighting experience. Different scenarios have different illuminance standards. For example, rural paths and courtyard walkways, only 5-15 lx is enough to meet the basic needs of pedestrian traffic; residential roads and factory side roads require 15-20 lx to ensure the safety of vehicles and pedestrians; urban and rural main roads and park main roads require 30-50 lx, while densely populated urban blocks and squares require illuminance of over 50 lx to eliminate blind spots.
Besides the parameters of the light source, the stability and uniformity of luminaires brightness are determined by multiple factors. The amount of energy stored is directly determined by the conversion rate of photovoltaic panels. The high conversion rate of monocrystalline silicon photovoltaic panels of high brightness solar street lights can provide sufficient energy storage, so that the lighting at night can be full and stable. If the battery capacity is insufficient or the battery is aging and depleted, it is easy to cause light decay and sudden drop of brightness at night. Professional design of lens light distribution is also important meanwhile. Good quality luminaires can distribute the light accurately to ensure that the road surface is evenly illuminated without any blind spots, avoiding the lighting defect of being bright in the center and dark around the edges.
TIANXIANG believes that the brightness of high quality solar street lights is not only a matter of power. The stable, uniform and satisfactory lighting effects are depended on the combination of the core parameters such as luminous efficacy and illuminance, with a better energy storage configuration and optical design. By scientifically matching brightness parameters, the problem of insufficient lighting can be solved, and the problem of resource waste caused by over-configuration can be avoided, thus maximally realizing the energy-saving and efficient lighting advantages of solar streetlights.
TIANXIANG specializes in manufacturing high quality solar street lights, using high transmittance light distribution design and high brightness LED light sources to provide evenly distributed and consistent illumination. TIANXIANG smart solar street lights are equipped with high-conversion photovoltaic panels and robust energy storage batteries, and provides long-lasting operation and no brightness degradation even on cloudy or rainy days. Our high brightness solar street lights are corrosion-resistant and anti-aging, sturdy and suitable for many outdoor scenarios, with high cost performance, full after-sales service, and support for customized engineering solutions.
Post time: Jun-16-2026
