Introduction to street lighting

Comprehensive Guide to Street Lighting Requirements

Road lighting requires precise light distribution to ensure:

• Uniform illuminance on road surfaces

• Reduced glare for drivers and pedestrians

• High optical efficiency with minimal wasted light

• Compliance with regional lighting standards

Secondary optics play a critical role in shaping asymmetric beam patterns to direct light exactly where it is needed.

SunLumin provides more than 40 optics for each streeyt Application scenarios.

Road Classification & Lighting Levels and parameters:

Expressways/Highways: Main Roads:

Secondary Roads: Residential/Branch Roads:

Special Applications: Intersections; Pedestrian Zones:

Luminance (Lₐᵥ): Illuminance (Eₕₐᵥ):

Uniformity: Total Luminance Uniformity (U₀); Longitudinal Uniformity (Uₗ);

Glare Control: Threshold Increment (TI); Maximum Light Intensity (Iₘₐₓ);

Lighting Power Density (LPD); Luminous Efficacy;

Luminaire Placement:

Mounting Height: 12–15 m for expressways, 8–12 m for residential roads .

Spacing: 30–50 m for main roads, adjusted for road width and curvature .

Optical Design Considerations

When selecting road lighting lenses, engineers should consider:

       •      Beam shape consistency across production batches

       •      Cut-off control to limit glare

       •      Compatibility with LED packages

       •      Material stability under UV exposure and temperature cycling

Our road lighting optics are designed using secondary optical simulation and validated through real application testing.