- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 30 Aug 2021
Rules of Thumb, Guidelines for building services (5th Edition) BG 9/2011, by Glenn Hawkins, published by BSRIA in 2011, defines lighting efficacy as: ‘The amount of light (luminous flux) produced by a light bulb or other light source, usually measured in lumens, as a ratio of the amount of power consumed to produce it, usually measured in watts.’
See also: Lamp efficacy.
 Related articles on Designing Buildings Wiki
Featured articles and news
It’s not always a case of the centre leading.
PHribbon toolbar developed for US market.
CIOB consultation seeks feedback on APPG 2020 report.
How to respond to changes made in the October 2021 update.
Resource provides professional installation assistance.
Adaptive planning proposal spans 15 years.
Activities summarised by the Construction Industry Council.
How Islamic architecture shaped Europe. Book review.
The campaign to preserve a rare blacksmith bridge.