Will the brightness of solar street lights diminish on rainy days?

Yes, the brightness of a solar street light will diminish on cloudy and rainy days. Since the intensity of sunlight is greatly reduced on cloudy and rainy days, the solar panel absorbs less light and produces less electricity. In order to ensure that the street light can continue to work during continuous rainy days, the system usually adjusts its strategy automatically by reducing the power output of the LED lights through the controller, thus reducing the brightness to save electricity. This means that on days without sufficient sunlight, the solar streetlight will continue to shine, but its brightness will be significantly reduced compared to sunny days, ensuring that the streetlight can maintain its illumination for a longer period of time with limited battery power.