Last edited 25 Aug 2020

Circuit-watt

According to the Domestic Building Services Compliance Guide published by HM Government in 2013, the term ‘circuit-watt’ refers to:

The power consumed in lighting circuits by lamps, and where applicable, their associated control gear (including transformers and drivers) and power factor correction equipment.

'Lamp lumens per circuit-watt is the total lamp lumens summed for all luminaires in the
relevant areas of the building, divided by the total circuit-watts for all the luminaires.'

'Luminaire lumens per circuit-watt is the (lamp lumens x LOR) summed for all luminaires
in the relevant areas of the building, divided by the total circuit-watts for all the luminaires.'

Ref Non-domestic Building Services Compliance Guide For Scotland, 2015 Edition v1.1, published by the Scottish Government, Building Standards Division in April 2018.

[edit] Related articles on Designing Buildings Wiki

Designing Buildings Anywhere

Get the Firefox add-on to access 20,000 definitions direct from any website

Find out more Accept cookies and
don't show me this again
"