This is a legacy version of the WELL Building Standard. Please check the latest version here.

Visual lighting design

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.

No. While the lights in the space must meet the lux levels referenced in this feature, dimming capability is not required.

Yes. When operating together, the lighting fixtures in the work space, not including task lighting, are what make up the ambient lighting system. This system must be able to maintain the average 215 average illuminance requirement.

Brightness management contrast is evaluated by the WELL Assessor by conducting spot checks and reviewing the professional narrative submitted as part of documentation. There are no specific parameters the project must meet, but the professional narrative must demonstrate that the brightness contrast conditions are factored in. For general guidance on typical contrast ratios, please refer to ANSI/IES American National Standard Practice for Office Lighting (RP-1-12).

Task light levels are evaluated through onsite spot measurements taken during the Performance Verification.

No, this feature does not require lighting to be dimmable, but does allow the project to dim lights in the presence of daylight. In order to confirm compliance during Performance Verification, the interior lighting would need to meet the lux/foot-candle requirement without the help of daylighting. During the lighting measurements, lights may be set to their maximum brightness.