How to calculate lighting for a parking lot?

Parking lot lighting calculation involves photometric design to ensure safety, security, and energy efficiency. Key factors:

• Target lux level: 10–20 lux for general parking, 30–50 lux for entrance and exit zones
• Uniformity ratio: minimum 0.4 (min/average) to avoid dark spots and shadows
• Pole height: 4–6m for small lots, 8–12m for large commercial parking areas
• Spacing: typically 3–4x pole height between fixtures for uniform coverage
• LED shoebox or flood fixtures at 100W–300W depending on height and coverage area