AuroraLighting Trade 2023

L1 & L2 Building Regulations

The Building Regulations 2010: 2021 Edition Conservation of Fuel and Power

The Building Regulations 2010: 2021 Edition Conservation of Fuel and Power

75lm/W

95lm/W

Conservation of Fuel and Power

Conservation of Fuel and Power

Conservation of Fuel and Power

compliant

exempt

compliant

Reasonable provision should be made for a dwelling to benefit from energy efficient lighting in the following instances: 1. A dwelling is extended 2. A new dwelling is created via change of use 3. The lighting system is being upgraded as part of a re-wire 4. New builds Fixed Interior Lighting In any of the above instances the lighting must have a minimum of 75 light source lumens per circuit Watt. Any single installed switch should operate no more than 6 lamp units, with a total capacity no greater than 100 Watt.

For a new or existing non-domestic building, all office, industrial, and storage spaces must have lighting that averages at least 95 luminaire lumens per circuit Watt or should observe a LENI calculation that follows Appendix B of Part L. Other spaces within non-domestic buildings must average at least 95 lamp lumens per circuit Watt for general lighting, or 80 light source lumens per circuit Watt for display lighting. LENI The Lighting Energy Numerical Indicator (known as LENI) offers another way for non-domestic buildings to comply with Part L2. LENI is a more complex calculation that requires the designer to calculate the performance of the lighting in terms of energy per square metre per year. This figure also takes lighting control into account, and is therefore based on a lighting design that takes into account all of the user’s needs. Recommendations for appropriate illuminance values and other lighting requirements are found in BS EN 12464-1:2011 ‘Light and Lighting - Lighting at work places - Indoor work places’. Much like the standard Part L2 requirements, there are separate allowances for display lighting. Lighting Controls Lighting controls should follow guidance found in BRE Digest 498 ‘Selecting lighting controls’. For general interior lighting, areas should avoid unnecessary lighting at times when either daylight levels are sufficient or the spaces are unoccupied. Areas should also feature local switching that’s accessible to users. Display lighting should be controlled on dedicated circuits. Unoccupied spaces should have presence detection and occupied spaces should have daylight sensing.

Internal light fittings should have zones of local control, which may be manual, automatic or a combination of both.

Information

Fixed Exterior Lighting Exterior lighting should have both of the following: 1. Daylight sensing 2.<75lm/W = automatic sensors/>75lm/W manual control

PLEASE NOTE - ABOVE INFORMATION IS A SUMMARY - PLEASE REFER TO RELEVANT BUILDING REGULATIONS FOR FULL DETAILS

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