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British standards

BS 5266-10:2008 update:

Guide to the design and provision of emergency lighting to reduce the risks from hazards in the event of failure of the normal lighting supply.

BS 5266-1, BS EN 1838/BS 5266-7 and BS EN 50172/BS 5266-8 already suggest minimum light levels required to allow safe evacuation or shut down processes, though references are mostly given in general terms.

BS 5266-10:2008 now provides specific guidance and recommendations on:

  • Hazards that can arise in a building as a result of the type or number of occupants
  • Design of premises and activities carried out within it
  • Occupants responsibilities in the event of a normal lighting supply failure
  • Factors in design and provision of emergency lighting systems to meet identified hazards for buildings
  • Ability for correctly installed emergency lighting to help reduce risk
  • Advice on appropriate emergency lighting levels, initiation times and working planes.

Advice for inspecting engineers

BS 5266-10 provides advice for inspecting engineers on the suitability of emergency lighting design and installation for new and existing systems, including:

  • Need for emergency lighting
  • Emergency lighting to be considered for specific locations
  • Portable emergency luminaires
  • Testing, maintenance and record keeping
  • Procedures to limit the risks of annual full duration testing.

Advice on annexes

BS 5266-10 covers annexes, providing guidance:

  • Luminance measurements and calculations
  • UK requirements for emergency lighting
  • Responses to queries on BS 5266-1
  • Compliance checks and reports for existing sites