Visual lighting design
- 53 Visual lighting design
- 54 Circadian lighting design
- 55 Electric light glare control
- 56 Solar glare control
- 57 Low-glare workstation design
- 58 Color quality
- 59 Surface design
- 60 Automated shading and dimming controls
- 61 Right to light
- 62 Daylight modeling
- 63 Daylighting fenestration
- P2 Light at night
- P3 Circadian emulation
53. Visual lighting design
To support visual acuity by setting a threshold for adequate light levels and requiring luminance to be balanced within and across indoor spaces.
Adequate light levels are needed for a broad variety of activities, including reading various qualities and types of print, and working on detail-oriented tasks. Brightness levels also contribute to the perception of spaciousness, as well as to the overall visual appeal of illuminated spaces. Targeted task lighting can provide the necessary amount of light at workspaces without over-illuminating ancillary spaces; ambient light levels of 300 lux are sufficient for most tasks. Pairing adjustable direct task lighting with indirect or diffuse ambient lighting allows user customization and good visual acuity while providing more suitable background light. Light intensity for visual acuity is measured in lux (or foot candles), which is a measure of the way the eye responds to light weighted to the response of the cone cells—the main photoreceptors for daytime vision, located on the retina of the human eye.
The following requirements are met at workstations or desks:
Provide a narrative that describes strategies for maintaining luminance balance in spaces, which takes into consideration at least two of the following:
The following light levels are achieved:
One or more light sources provide the following:
The ambient lighting system at desks in classrooms for the specified age groups meet the following requirements:
The ambient lighting system at dining surfaces for the specified restaurant types meet the following requirements:
|Core & Shell||New & Existing Buildings||New & Existing Interiors|
|Part 1: Visual Acuity for Focus||-||P||P|
|Part 2: Brightness Management Strategies||-||P||P|
|Commercial Kitchen||Education||Multifamily Residential||Restaurant||Retail|
|Part 1: Visual Acuity for Focus||-||P||-||-||-|
|Part 2: Brightness Management Strategies||-||P||-||-||-|
|Part 3: Commercial Kitchen Lighting||P||-||-||-||-|
|Part 4: Visual Acuity in Living Environments||-||-||O||-||-|
|Part 5: Visual Acuity for Learning||-||P||-||-||-|
|Part 6: Visual Acuity for Dining||-||-||-||P||-|
Verification Methods Matrix
|Letters of Assurance||Annotated Documents||On-Site Checks|
|Part 1: Visual Acuity for Focus||Architect||Policy Document||Spot Measurement|
|Part 2: Brightness Management Strategies||Professional Narrative|
|Part 3: Commercial Kitchen Lighting||Architect||Spot Measurement|
|Part 4: Visual Acuity in Living Environments||Architect||Spot Measurement|
|Part 5: Visual Acuity for Learning||Architect||Spot Measurement|
|Part 6: Visual Acuity for Dining||Architect||Spot Measurement|
The Ontario Ministry of Labour's "Computer Ergonomics: Workstation Layout and Lighting" provides a checklist for computer workstations, which includes checking that light levels fall within 300-500 lux, and also that task lights are provided if required.
The lighting level values in the U.S. GSA’s 2003 Facilities Standards (P100) are set at 500 lux for kitchens.
The Dining Services Ergonomic Design Guidelines recommends lighting levels between 70 and 100 foot candles in warewashing areas for the safety and wellbeing of foodservice employees.
ANSI/IES RP-1-12 provides recommended luminance ratios for offices.
ANSI/IES RP-1-12 provides recommended luminance ratios for offices. It notes that studies suggest that ratios do not exceed 3:1 or 1:3 between a paper task and an adjacent visual display terminal.
ANSI/IES RP-1-12 provides recommended luminance ratios for offices. It notes that for ceiling luminance ratios, 10:1 is the maximum acceptable ratio.
ANSI/IES RP-1-12 provides recommended luminance ratios for offices. It notes that studies suggest that ratios do not exceed 10:1 or 1:10 between a task and a remote surface.
ANSI/IES RP-1-12 provides Table B1 for recommended maintained illuminance targets for the horizontal plane. Table B1h recommends a target value of 100 lux for casual dining and 200 lux for fast food dining.
ANSI/IES RP-1-12 provides Table B1 for recommended maintained illuminance targets for the horizontal plane. Table B1h recommends a target value of 150 lux for cafeterias.
ANSI/IES RP-1-12 provides Table B1 for recommended maintained illuminance targets for the horizontal plane. Table B1h recommends a target value of 30 lux for fine dining.