Key Recommendations for Street Light Selection: Balancing Performance, Cost, and Adaptability​

Different scenarios demand specific illuminance, uniformity, color temperature, and color rendering index (CRI), as specified in the Code for Design of Urban Road Lighting (CJJ45-2015). Mismatched parameters will compromise usability regardless of product quality. For urban arterial roads, an average illuminance of 20-30lx (30-50lx for expressways) with a color temperature of 4000K-5000K (cool white) and CRI ≥60 is recommended, paired with 8-12m poles spaced 25-35m apart to ensure glare-free visibility. Secondary roads and branch roads require 10-20lx illuminance, 4000K neutral light, and 6-8m poles. Rural roads prioritize cost-effectiveness and ease of maintenance, with 5-10lx illuminance, 3000K-4000K light, and 5-6m poles. Residential and scenic areas benefit from warmer light (2700K-3000K) and higher CRI (≥70) to avoid disturbing residents and enhance ambiance.​

LEDs have become the gold standard, outperforming traditional high-pressure sodium lamps and metal halide lamps by reducing energy consumption by over 60% and extending lifespan by 3-5 times. When selecting LEDs, opt for high luminous efficacy (≥130lm/W, or ≥150lm/W for municipal projects) to minimize energy use. Match power to the scenario—for example, 30-50W LEDs suffice for 6m rural road poles, eliminating unnecessary high-power waste. Choose AC220V for grid-connected areas and DC12V/24V for solar-powered systems. Prioritize LEDs with chips from reputable brands (e.g., Philips, Osram) and constant-current isolated drivers with a minimum 3-year warranty (light source warranty ≥5 years) for stability, especially in areas with unstable power grids.​

Power supply selection depends on grid accessibility, energy costs, and installation complexity. Mains-powered LED lights offer high stability and low maintenance, ideal for urban roads and residential areas with reliable grid coverage, but incur ongoing electricity fees and require cable laying. Solar-powered LEDs are perfect for remote rural areas or locations with high wiring costs—they operate without electricity bills and are easy to install. For optimal solar performance, follow the ratio of "solar panel power: LED power = 3-5:1" and ensure the battery can support 3-5 rainy days of operation. Colloidal lead-acid batteries (suitable for cold regions) or lithium iron phosphate batteries (longer lifespan, ≥8 years) are preferred over conventional lead-acid batteries. Wind-solar hybrid systems provide stable energy storage for windy areas (e.g., coastal regions) but come with higher costs. Smart controllers (PWM/MPPT) and functions like light control, time control, and motion sensing further enhance energy efficiency.​

Pole material and design must withstand local wind speeds, terrain, and environmental conditions. Hot-dip galvanized steel poles offer the best balance of strength, corrosion resistance, and cost-effectiveness, suitable for all scenarios—with a thickness of ≥3.0mm for municipal projects and ≥2.5mm for rural use. Aluminum poles are lightweight, corrosion-resistant, and aesthetically pleasing, ideal for scenic areas and coastal regions with high salt spray. Fiberglass poles excel in corrosive industrial zones but have lower impact resistance. All poles require double anti-corrosion treatment (hot-dip galvanizing + powder coating) with galvanized layer thickness ≥60μm and powder coating ≥80μm. Pole height and spacing should match lighting requirements to avoid dark spots, with straight poles for arterial roads and decorative designs (e.g., courtyard-style) for scenic trails—avoid over-design that increases wind resistance and costs.​