Aurora Lighting Trade 2020 Brochure

L1 & L2 Building Regulations

The Building Regulations 2013 Conservation of Fuel and Power

The Building Regulations 2013 Conservation of Fuel and Power

45lm/W

Less than 5W

60lm/W

Conservation of Fuel and Power

Conservation of Fuel and Power

Conservation of Fuel and Power

compliant

exempt

compliant

L1A / L1B Compliance – What does it mean? Reasonable provision should be made for a dwelling to bene fi t from energy ef fi cient 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 Minimum of 45 Lumens per Watt A single switch should operate no more than 6 lamp units, with a total capacity no greater than 100 watts Fixed Internal Lighting To comply with the current building regulations L1A and L1B, the lamp used must have a luminous ef fi cacy greater than 45 lumens per circuit- watt and total output greater than 400 lamp lumens. The circuit-watt fi gure is measured as the power consumed in the lighting circuit by the lamp and its associated control gear and power factor correction equipment. Light fi ttings with GLS tungsten fi lament or tungsten halogen lamps would not meet the standard. Reasonable Provision Within the area of the building work in the main dwelling areas, the fi xed energy ef fi cient lighting fi ttings should not be less than three in every four lighting fi ttings. Infrequently used areas i.e. garages, cupboards and other storage areas are not included in the count. Any lighting fi tting with a supply circuit wattage less than 5 Watts is also excluded from the count. Fixed External Lighting Lighting which is deemed as fi xed to the external surface of a dwelling and powered by the occupier’s supply. (Excludes communal areas in fl ats etc.) Reasonable Provision Light fi ttings should be made to enable effective control and/or the use of ef fi cient lamps Light fi ttings have a lamp capacity that does not exceed 100W per fi tting and that the light automatically switches off when 1. There is enough daylight 2. The area being lit is unoccupied, or lighting is no longer required OR The light fi ttings use a lamp with an ef fi cacy of greater than 45 Lumens per circuit watt, is manually controlled by the occupants and that the light automatically switches off when there is enough daylight.

L2A / L2B Compliance – What does it mean? These building regulations refer to new or existing, non-domestic buildings, of fi ce, industrial and storage spaces (where of fi ce also includes those areas that involve predominantly desk based tasks, such as seminar rooms, conference and classrooms including those in schools) which require 60 luminaire Lumens per circuit Watt. Other areas might be those such as hotels, bars etc. which require 60 lamp lumens per Watt. Fixed Internal Lighting To comply with the current Building Regulations L2A and L2B, general interior lighting should meet either one of two energy ef fi ciency evaluation methods 1. Ef fi cacy – Averaging over the whole area being considered, the luminaire used must have an equivalent luminous ef fi cacy greater than 60 luminaire Lumens per circuit Watt. Reduced levels are allowed with the use of control systems. OR 2. Calculate the LENI (Lighting Energy Numerical Indicator), which calculates the performance of the lighting in terms of energy per square metre per year. Maximum limits are provided in the regulations. LENI is calculated based on a lighting design that meets all the user’s needs including controls. Recommendations for appropriate illuminance values and other lighting requirements may be found in BS EN 12464-1:2011 ‘Light and lighting – Lighting at work places – Indoor work places’. Both Methods have separate allowances for display lighting. Lighting Controls Lighting Controls should follow guidance in BRE Digest 498, ‘Selecting lighting controls’. For general interior lighting, areas should avoid unnecessary lighting at times when either daylight levels are suf fi cient or the spaces are unoccupied. Display lighting should be controlled on dedicated circuits. Note - Automatically switched lighting should be subject to a risk assessment on the grounds of safety and suitability. Reasonable Provision This should include easily accessible local switching within each area or at the boundaries between those working areas and main point access routes. Supplementary Switching Automatic controls in addition to any local controls could further aid energy management by either: 1. Switching lighting off when no occupants are detected; or 2. Dimming or switching off lighting when there is suf fi cient daylight

Information

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

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