💡 External Lighting Assessment
Assess external lighting impact using ILP GN01 guidance and CIE standards for planning applications. Includes zone compliance, upward light ratio assessment, and bat ecology lighting guidance.
Calculating lighting assessment...
About this tool: External Lighting
ILP GN01 obtrusive light screening — environmental zones, light spill, glare and sky-glow on residents and ecology.
Use for external, floodlighting or sports lighting, or sites near sensitive receptors, dark-sky areas or bat roosts.
ILP GN01:2021, NPPF living conditions policy P3
Use these tools when preparing technical reports and compliance documentation. Many of these are validation requirements — submit without them and your application will be returned. Use the Validation Pre-Flight tool to check which ones you actually need.
Guidance to help you prepare — not formal planning advice. Check the current policy text and your council's local plan before relying on it.