Cookie Warning

This site uses cookies to store information on your computer. See our Cookie Policy page for more details

I am happy with this

UK Building Regulations 2013

The UK Building Regulations were amended in 2013. These amendments mean that 75% of the products used in a project must deliver a minimum of 400 lumens with an efficiency greater 45 lm/cW for compliance with Part L1. A minimum of 55 luminaire lumens/circuit Watt, averaged over the whole area for general lighting is required to comply with Part L2.

Part L1 refers to new and existing dwellings, whilst Part L2 refers to new and existing buildings other than dwellings. The EcoStar lighting range is Part L Compliant.

Fittings that are less than 5W are exempt from the total count. This means that installing an array of 4W or 4.5W LED fittings would not count, and the rest of the project would require more to reach the 75%. Our full EcoStar range is over 5W so will count towards the 75%.

You can download the latest Part L documents here. Other documents can be downloaded using the links below:

Domestic Compliance Guide 2013 (Page 81, section 12)

Non-Domestic Compliace Guide 2013 (Page 65, section 12)

Scottish Domestic Building Regs Section 6.5

Scottish Non-Domestic Building Regs Section 6.5

New dwellings must also comply with the new Code for Sustainable Homes which has further requirements to Building Regulations for energy and CO2 emissions.

Building Regulations EcoStar Part L Lumen Output Building Regulations EcoStar Part L Efficacy Diagram

A Summary of Part L1

  • At least 75% of fittings must be low energy, defined as

          - Efficiency greater than 45 lamp lumens/cW

          - Delivering at least 400lm 

  • Fittings less than 5W are exempt from the total count
  • Fittings in infrequently accessed areas (such as cupboards) are exempt
  • Halogen and GLS lamps are highlighted in the guidelines as non-compliant

A Summary of Part L2

  • A minimum 55 luminaire lumens/cW, averaged over the whole area for general lighting
  • A minimum 22 lamp lumens/cW, averaged over the whole area for display lighting
  • A control factor of 0.9 can be applied to the efficiency when occupancy sensors are used
  • A control factor of 0.9 can be applied to the efficiency when daylight sensors are used
  • A control factor of 0.85 can be applied when both types of controls are used
  • It is not necessary for individual luminaires to meet 55 luminaire lumens per circuit Watt, giving the designer flexibility to use a mix of technologies that average 55lm/cW