the Building Regulations 2000, L1A / L1B Compliance – What does it mean?

One can find not just list of prices and a list of items in the Aurora Lighting catalogues / website, but also lots of useful information related to the Building Regulations and the Wiring Regulations. Below we are re-posting what they compiled concerning the Building Regulations 2000 – Conservation of fuel and power, L1A / L1B compliance(what does it mean?).

The Building Regulations 2000 – conservation of fuel and power

The Part L1A / L1B Compliance – What does it mean?

Reasonable provision should be made for a dwelling to benefit for energy efficient electric lighting in the following instances:

  • When a dwelling is extended
  • When a new dwelling is created via a change of use
  • When the lighting system is being upgraded as part of a re-wire
  • For the new builds

the Building Regulations 2000, L1A / L1B Compliance – What does it mean? - in the picture, Part L1 Aluminium 240V SGU10 13W Low Energy Fixed Fire Protection DownlightFixed internal lighting

These meed to comply with the Building Regulations 2000 (2006 update) L1A the light fitting should only be able to accept lamps having a luminous efficacy greater than 40 lumens per circuit-watt. The circuit-watt is measured as the power consumed in the lighting circuit by the lamp and its associated control gear and power factor correction equipment. This practically means that the fluorescent and the compact fluorescent light fittings would comply, whereas GLS tungsten filament lamps and halogen lamps would not. This should allow flexibility of design to vary the light output ratio.

Reasonable provision for the Fixed Internal Lighting

The Fixed Downlights within the area of the building work the fixed energy efficient lighting should comprise of not less than one (1) per 25m sq of dwelling floor area (not including garages). OR One (1) per four (4) fixed fittings. Note – The cupboards and other storage areas would not count towards these totals

Fixed external lighting - Which is deemed as fixed to the external surface of a dwelling and powered by the occupier's supply(excludes communal area in flats, etc). In the picture - Irene Outdoor Ceiling Light, Flush Square Fixture, IP44 Bronze 2 x 60W E27Fixed external lighting

Which is deemed as fixed to the external surface of a dwelling and powered by the occupier’s supply(excludes communal area in flats, etc).

Reasonable Provision for the Fixed External Lighting

The Fixed External Lighting should be made to enable effective control and/or the use of efficient lamps. Lamp capacity does not exceed 150W per fitting that the light automatically switches off: if there is enough daylight, or when it is no longer required at night. OR the light fittings have lamp holders which can only accept lamps with an efficacy of greater than 40 lumens per circuit-watt.

Please note: all the above information is a summary – please refer to the relevant building regulations for full details!

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