An Introduction to Part L

In April 2006 the new Part L building regulations came into effect with the aim of reducing carbon emissions. Now, the Part L regulations require all commercial buildings to produce 28% less Carbon Dioxide than before.

Revised regulations are due in October 2010 and our product range has been engineered with those changes in mind.

The 2010 newly published approved documents & guidance notes may be downloaded here:

Building Regulations Part L1a

Building Regulations Part L1b

Building Regulations Part L2a

Building Regulations Part L2b

Guidance Notes

Guidance Notes Non Domestic

Halers Lighting Luminaires and Part L

The EvoLED™ product range is designed to be 2006 Part L compliant with light output of 54 lumen per circuit watt, making it Part L1 (>40 lumen per circuit watt currently, >45 lumen/circuit watt in October 2010) compliant and Part L2 compliant (>45 Lumens per circuit watt >55 lumen/circuit watt in October 2010). Part L1 relates to domestic dwellings and part L2 relates to commercial buildings. 

Domestic regulations (part L1) will change in October to requiring 75% of lighting to meet 45 lamp lumens/circW with a minimum lumen output of 400 lumens. The figure is calculated without the LOR (light Output Ratio of the fitting) applied. All of our products meet this requirement, and when combined with the IP65 rating of the EvoLED™, make fitting our LEDs in kitchens and bathrooms a simple and effective way of achieving both the new regulations and CIBSE guidelines.

Non-Domestic regulations (part L2) will change in October to requiring the average of all general lighting (not display lighting) to achieve 55 luminaire lumens/circW. The new regulations also permit this average to be achieved through a combination of efficient sources and control systems, particularly daylight linking and occupancy sensors.

As the luminous efficacy of LED light reduces significantly with increasing temperature, it is important for efficiency and lifetime to maintain a low operating temperature. This is achieved by having a highly efficient thermal path from the LEDs to the heatsink. Our heatsinking technology is part of an advanced thermal management solution enabling our products to maintain the optimum junction temperature for long life, efficiency and output. Halers Lighting will continue to enhance the performance of its products and will ensure all its product comply with Part L regulations.