Lighting energy numeric indicator LENI - Revision history

Designing Buildings at 09:43, 27 December 2021

2021-12-27T09:43:35Z

← Older revision		Revision as of 09:43, 27 December 2021
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	NB The revised approved documents also increased the minimum initial luminaire efficacy for general lighting from 55 to 60 luminaire lumens per circuit watt.		NB The revised approved documents also increased the minimum initial luminaire efficacy for general lighting from 55 to 60 luminaire lumens per circuit watt.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings =
−		+
−	=== Related articles on Designing Buildings ~~Wiki ==~~=	+

	* 2013 changes to the approved documents for part L of the building regulations.		* 2013 changes to the approved documents for part L of the building regulations.
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	* Daylight lighting systems.		* Daylight lighting systems.
	* Part L.		* Part L.
−
−	~~=== External references ===~~
−
−	* Orlight, Guide on lighting risks and regulations, April 2014.
−	* Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.

	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Regulation]] [[Category:DCN_Standard]] [[Category:Regulations]] [[Category:Standards_/_measurements]] [[Category:Sustainability]]		[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Regulation]] [[Category:DCN_Standard]] [[Category:Regulations]] [[Category:Standards_/_measurements]] [[Category:Sustainability]]

Designing Buildings at 06:14, 13 October 2020

2020-10-13T06:14:47Z

← Older revision		Revision as of 06:14, 13 October 2020
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	* Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.		* Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.

−	[[Category:~~Regulations~~]] [[Category:~~DCN_Regulation~~]] [[Category:~~Standards_/_measurements~~]] [[Category:DCN_Standard]] [[Category:Sustainability]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Regulation]] [[Category:DCN_Standard]] [[Category:Regulations]] [[Category:Standards_/_measurements]] [[Category:Sustainability]]

Designing Buildings at 16:14, 9 February 2017

2017-02-09T16:14:35Z

← Older revision		Revision as of 16:14, 9 February 2017
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	* Approved documents.		* Approved documents.
	* Building regulations.		* Building regulations.
		+	* Lamp.
	* Lighting.		* Lighting.
	* Daylight lighting systems.		* Daylight lighting systems.
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	* Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.		* Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.

−	[[Category:Regulations]] [[Category:Standards_/_measurements]] [[Category:Sustainability]]	+	[[Category:Regulations]] [[Category:DCN_Regulation]] [[Category:Standards_/_measurements]] [[Category:DCN_Standard]] [[Category:Sustainability]]

Designing Buildings at 11:45, 9 February 2017

2017-02-09T11:45:37Z

← Older revision		Revision as of 11:45, 9 February 2017
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	* Approved documents.		* Approved documents.
	* Building regulations.		* Building regulations.
		+	* Lighting.
	* Daylight lighting systems.		* Daylight lighting systems.
	* Part L.		* Part L.

Designing Buildings at 09:58, 14 January 2016

2016-01-14T09:58:25Z

← Older revision		Revision as of 09:58, 14 January 2016
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−
	Changes to the approved documents for Part L of the building regulations came into effect on 6 April 2014 when the 2013 editions of approved documents L1A and L2A came into force along with 2013 amendments to the 2010 editions of approved documents L1B and L2B.		Changes to the approved documents for Part L of the building regulations came into effect on 6 April 2014 when the 2013 editions of approved documents L1A and L2A came into force along with 2013 amendments to the 2010 editions of approved documents L1B and L2B.

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	This was a change that had been campaigned for by the lighting industry to bring lighting design into alignment with European standards and to give designers greater flexibility.		This was a change that had been campaigned for by the lighting industry to bring lighting design into alignment with European standards and to give designers greater flexibility.

−	The Lighting Energy Numeric Indicator was originally defined by BS EN 15193:2007, Energy performance of buildings. However, the calculation methodology set out in the Non-domestic Building Services Compliance Guide is a much simplified version.	+	The Lighting Energy Numeric Indicator was originally defined by BS EN 15193:2007, Energy performance of buildings. However, the calculation methodology set out in the Non-domestic Building Services Compliance Guide is a much simplified version.

	LENI is an indicator of the efficiency of an entire lighting installation, including controls and is expressed in terms of energy per square metre per year (kWh/m2/yr). The calculated LENI must not exceed prescribed limit for a given illuminance and the number of hours per year the lighting will be required, as set out in Table 44 of the compliance guide.		LENI is an indicator of the efficiency of an entire lighting installation, including controls and is expressed in terms of energy per square metre per year (kWh/m2/yr). The calculated LENI must not exceed prescribed limit for a given illuminance and the number of hours per year the lighting will be required, as set out in Table 44 of the compliance guide.

	LENI is calculated based on the level of illuminace in a particular area and the number of hours a year that the lighting will be required. The calculation takes into account:		LENI is calculated based on the level of illuminace in a particular area and the number of hours a year that the lighting will be required. The calculation takes into account:
−	*Energy used by any lighting control systems (parasitic energy use Ep).	+
−	*The total power of the lighting in watts (Pl).	+	* Energy used by any lighting control systems (parasitic energy use Ep).
−	*Energy saved by automatic control systems that switch off lights when rooms are empty (occupancy factor Fo).	+	* The total power of the lighting in watts (Pl).
−	*Energy saved by automatic control systems that dim lighting if daylight is available (Fd)	+	* Energy saved by automatic control systems that switch off lights when rooms are empty (occupancy factor Fo).
−	*The reduction in performance through the life of the system (constant illuminance factor Fc)	+	* Energy saved by automatic control systems that dim lighting if daylight is available (Fd)
		+	* The reduction in performance through the life of the system (constant illuminance factor Fc)

	The LENI is the sum of energy use (daytime, night-time and parasitic energy use) divided by the area.		The LENI is the sum of energy use (daytime, night-time and parasitic energy use) divided by the area.
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	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===
−	*2013 changes to the approved documents for part L of the building regulations.	+
−	*Approved documents.	+	* 2013 changes to the approved documents for part L of the building regulations.
−	*Building regulations.	+	* Approved documents.
−	*Daylight lighting systems.	+	* Building regulations.
−	*Part L.	+	* Daylight lighting systems.
		+	* Part L.

	=== External references ===		=== External references ===
−	*Orlight, [http://media.orlight.com/media/downloads/Orlight_guide_on_lighting_risks_3.pdf Guide on lighting risks and regulations], April 2014.
−	*Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.

−	[[Category:Regulations]]	+	* Orlight, Guide on lighting risks and regulations, April 2014.
−	[[Category:Standards_/_measurements]]	+	* Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.
−	[[Category:Sustainability]]	+
		+	[[Category:Regulations]] [[Category:Standards_/_measurements]] [[Category:Sustainability]]

Designing Buildings at 07:05, 23 July 2014

2014-07-23T07:05:46Z

Designing Buildings: moved Lighting energy numeric indicator to Lighting energy numeric indicator LENI

2014-07-23T06:59:09Z

moved Lighting energy numeric indicator to Lighting energy numeric indicator LENI

← Older revision

Revision as of 06:59, 23 July 2014

Designing Buildings: Created page with " Changes to the approved documents for Part L of the building regulations came into effect on 6 April 2014 when the 2013 editions of approved documents L1A and L2A came into forc..."

2014-07-23T06:57:50Z

Created page with " Changes to the approved documents for Part L of the building regulations came into effect on 6 April 2014 when the 2013 editions of approved documents L1A and L2A came into forc..."

New page

Changes to the approved documents for Part L of the building regulations came into effect on 6 April 2014 when the 2013 editions of approved documents L1A and L2A came into force, and 2013 amendments to the 2010 editions of approved documents L1B and L2B came into force.

Approved documents L2A and L2B refer to the Non-domestic Building Services Compliance Guide 2013 edition which introduces the Lighting Energy Numeric Indicator (LENI) as an alternative means of demonstrating compliance. This means that the compliance of lighting systems can now be demonstrated either by meeting the recommended minimum standards for efficacy and building controls, or by meeting the recommended minimum standards for LENI.

This was a change that had been campaigned for by the lighting industry for some time to bring lighting design into alignment with European standards and to give designers greater flexibility.

LENI was originally defined by EN.15193-2007, Energy performance of Buildings. However, the calculation methodology set out in the Non-domestic Building Services Compliance Guide is a much simplified version. It is an indicator of the efficiency of an entire lighting installation, including controls and is expressed in terms of energy per square metre per year (kWh/m2/yr).

The calculated LENI must not exceed prescribed limit for a given illuminance and the number of hours per year the lighting will be required as set out in Table 44 of the compliance guide.

It is calculated based on the level of illuminace in a particular area and the number of hours a year that the lighting will be required. The calculation takes into account:
*Energy used by any lighting control systems (parasitic energy use Ep).
*The total power of the lighting in watts (Pl).
*Energy saved by automatic control systems that switch off lights when rooms are empty (occupancy factor Fo).
*Energy saved by automatic control systems that dim lighting if daylight is available (Fd)
*The reduction in performance through the life of the system (constant illuminance factor Fc)

The LENI is the sum of energy use (daytime, night-time and parasitic energy use) divided by the area.

NB The revised approved documents also increased the minimum initial luminaire efficacy for general lighting from 55 to 60 luminaire lumens per circuit watt.

= Find out more =

=== Related articles on Designing Buildings Wiki ===
*2013 changes to the approved documents for part L of the building regulations.
*Approved documents.
*Building regulations.
*Daylight lighting systems.
*Part L.

=== External references ===
*Orlight, [http://media.orlight.com/media/downloads/Orlight_guide_on_lighting_risks_3.pdf Guide on lighting risks and regulations], April 2014.
*Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition, for use in England.

[[Category:Regulations]]
[[Category:Standards_/_measurements]]
[[Category:Sustainability]]

← Older revision		Revision as of 07:05, 23 July 2014
Line 1:		Line 1:

−	Changes to the approved documents for Part L of the building regulations came into effect on 6 April 2014 when the 2013 editions of approved documents L1A and L2A came into force~~, and~~ 2013 amendments to the 2010 editions of approved documents L1B and L2B ~~came into force~~.	+	Changes to the approved documents for Part L of the building regulations came into effect on 6 April 2014 when the 2013 editions of approved documents L1A and L2A came into force along with 2013 amendments to the 2010 editions of approved documents L1B and L2B.

−	Approved documents L2A and L2B refer to the Non-domestic Building Services Compliance Guide 2013 edition which introduces the Lighting Energy Numeric Indicator (LENI) as an alternative means of demonstrating compliance. This means that ~~the~~ compliance ~~of lighting systems~~ can now be demonstrated either by meeting the recommended minimum standards for efficacy and building controls, or by meeting the recommended minimum standards for LENI.	+	Approved documents L2A and L2B refer to the Non-domestic Building Services Compliance Guide 2013 edition which introduces the Lighting Energy Numeric Indicator (LENI) as an alternative means of demonstrating the compliance of lighting systems. This means that compliance can now be demonstrated either by meeting the recommended minimum standards for efficacy and building controls, or by meeting the recommended minimum standards for LENI.

−	This was a change that had been campaigned for by the lighting industry ~~for some time~~ to bring lighting design into alignment with European standards and to give designers greater flexibility.	+	This was a change that had been campaigned for by the lighting industry to bring lighting design into alignment with European standards and to give designers greater flexibility.

−	~~LENI~~ was originally defined by EN.15193-2007, Energy performance of ~~Buildings~~. However, the calculation methodology set out in the Non-domestic Building Services Compliance Guide is a much simplified version~~. It is an indicator of the efficiency of an entire lighting installation, including controls and is expressed in terms of energy per square metre per year (kWh/m2/yr)~~.	+	The Lighting Energy Numeric Indicator was originally defined by BS EN 15193:2007, Energy performance of buildings. However, the calculation methodology set out in the Non-domestic Building Services Compliance Guide is a much simplified version.

−	The calculated LENI must not exceed prescribed limit for a given illuminance and the number of hours per year the lighting will be required as set out in Table 44 of the compliance guide.	+	LENI is an indicator of the efficiency of an entire lighting installation, including controls and is expressed in terms of energy per square metre per year (kWh/m2/yr). The calculated LENI must not exceed prescribed limit for a given illuminance and the number of hours per year the lighting will be required, as set out in Table 44 of the compliance guide.

−	It is calculated based on the level of illuminace in a particular area and the number of hours a year that the lighting will be required. The calculation takes into account:	+	LENI is calculated based on the level of illuminace in a particular area and the number of hours a year that the lighting will be required. The calculation takes into account:
	*Energy used by any lighting control systems (parasitic energy use Ep).		*Energy used by any lighting control systems (parasitic energy use Ep).
	*The total power of the lighting in watts (Pl).		*The total power of the lighting in watts (Pl).
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	=== External references ===		=== External references ===
	*Orlight, [http://media.orlight.com/media/downloads/Orlight_guide_on_lighting_risks_3.pdf Guide on lighting risks and regulations], April 2014.		*Orlight, [http://media.orlight.com/media/downloads/Orlight_guide_on_lighting_risks_3.pdf Guide on lighting risks and regulations], April 2014.
−	*Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition~~, for use in England~~.	+	*Planning portal, [http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/compliance Domestic and Non-domestic Building Services Compliance Guide], 2013 edition.

	[[Category:Regulations]]		[[Category:Regulations]]
	[[Category:Standards_/_measurements]]		[[Category:Standards_/_measurements]]
	[[Category:Sustainability]]		[[Category:Sustainability]]