Glare
According to BRE’s The essential guide to retail lighting: Glare is; ‘Discomfort experienced when lighting is excessively bright when viewed against the surroundings. Often the result of inadequately shielded lamps.'
The CIBSE SLL Code for Lighting (2012) defines glare as '...the condition of vision in which there is discomfort or a reduction in the ability to see details or objects, caused by an unsuitable distribution or range of luminance, or to extreme contrasts.'
The Illustrated Guide to Electrical Building Services, Third Edition (BG 31/2017), by David Bleicher & Peter Tse, published by BSRIA in 2014, states: ‘Glare is caused by extreme contrasts in luminance – for example extremely bright objects in the same vicinity as extremely dark objects. The problem of glare can take two basic forms: discomfort glare and disability glare.'
'Discomfort glare is likely to occur whenever one area of an internal space is significantly brighter than the surrounding area. Two common causes are excessive daylight entering windows and inappropriate or poorly positioned luminaires.'
'Disability glare can make work tasks difficult, and may occur when a source of bright light exists close to the line of sight. Light sources such as fluorescent lamps have very bright surfaces, however most luminaires are designed so that the lamp is rarely in the field of vision.’
[edit] Related articles on Designing Buildings Wiki
- Artificial lighting.
- Aspects of daylighting design covered by EN 17037.
- Ballast or control gear.
- BREEAM Visual comfort Glare control.
- BREEAM Visual comfort View out.
- Colour appearance.
- Daylight benefits in healthcare buildings.
- Daylight factor.
- Daylight lighting systems.
- Designing daylight solutions for commercial buildings.
- Dichroic reflector.
- Discharge lamp.
- EN 17037 Daylight in buildings.
- Extra-low voltage lamps.
- General lighting v task lighting.
- Illuminance.
- Lamp efficacy.
- Light pollution.
- Lighting.
- Lighting energy numeric indicator LENI.
- Lighting of construction sites.
- Luminaire efficacy.
- Natural light.
- Retrofitting solar shading.
- Rights to light.
- Types of building EN 17037 applies to.
- When hospital buildings aren’t healthy.
Featured articles and news
Provisional findings show illegal cartels in the industry.
CIAT reporting from the Competition and Markets Authority.
Making sustainable construction number one priority.
The future of construction report.
Interview with ECA CEO.
Many provisions came into force on June 28, 2022.
With room to expand.
An information packed session at the BSRIA conference.
Refurbishment, Energy Efficiency, Indoor air and process.
Considering building acoustics with the AT Journal.
Why building acoustic considerations must be non-negotiable.
Create a profile, write informed product articles and share.
Aluminium Composite Panels (ACP) is one example.
Top 50 Women in engineering 2022.
Inventors and innovators at ICE.
Life, death and art at the Stuart court. Book review.
Real estate, place adaptation and innovation.
Review and comment on the revised draft before July 11.
We are indeed now 10 years old, so go on and be bold !
Write about something you know, help us build and grow !
IHBC's 25th anniversary 2022 Aberdeen School.
A blended event and triumphant return.
New Construction Leadership Council Co-Chair selected.
Mark Reynolds succeeds Andy Mitchell as Co-Chair of CLC
Designing Buildings is 10 years old.
Types of work to existing buildings.
From alteration to deconstruction on DB.
Publication available
Changes come into force for F,L,O and S.