Light attenuation refers to the phenomenon where the luminous flux of an LED light source gradually decreases over time during

long-term use. It does not suddenly fail but is a slow process influenced by the chip material, heat dissipation structure, driving

current, and environmental temperature and humidity. High-quality LED light beads, when operating at a constant temperature

of 25°C for 10,000 hours, typically have a light attenuation of less than 10%; while in cases of poor heat dissipation or large power

supply fluctuations, the light attenuation can exceed 25% after only 3,000 hours. The rural outdoor environment has large

temperature differences between day and night, a lot of dust, and unstable power supply, which places higher demands on the

thermal management and light efficiency maintenance of the lamps - this is precisely why high-density aluminum lamp shells,

IP65 protection + double-layer heat dissipation fins, and constant current drive modules have become the key design logic for

rural solar street lamps.

The 6-meter double-arm lamp pole installed at the edge of the village square automatically lights up in the evening. The warm

white light spreads gently like a thin veil, evenly falling on the stone pavement, even the water droplets on the clothesline are

glistening . Children chase after their shadows, the elderly sit on the steps with fans and chat, and even the cats like to take a

nap in the light circle. The 8-meter model is used on the main roads. During the day, the photovoltaic panels absorb sufficient

sunlight, and in rainy days, they can last for several nights - not by adding power, but by precisely matching the actual rural

lighting duration and power usage rhythm.

Relying on years of industry cultivation and technology precipitation, Guangdong Guangyun Lighting Co., Ltd. is a

comprehensive high-tech lighting enterprise integrating product research and development, large-scale production, global

sales and professional after-sales. The company always adheres to the core business philosophy of "quality as the foundation

and customer as the center", and provides customers with high-quality photovoltaic lighting products and supporting

solutions with strict production standards and perfect service system. This paper systematically explains the professional

selection criteria of outdoor solar projection lights from five core dimensions.