{"id":18367,"feature_order":2,"feature_code":null,"name":"Visual Lighting Design","type":"P","intent":"<p>Provide visual comfort and enhance visual acuity for all users through electric lighting.<\/p>","intervention":"<p>This WELL feature requires projects to provide appropriate illuminances on work planes for regular users of all age groups, as required for the tasks performed in the space.<\/p>","issue":"<p>Humans perceive the world through visual cues that are received through images formed on the retina of the eye. The light levels in a space can enhance the user&rsquo;s ability to perform tasks in that space, while contributing to the feeling of spaciousness. The age of the individual is also a factor in the amount of light required for visual acuity. As humans age, the transmission of light through their lenses is reduced. This is due to age-related changes, including increased light absorption by the lenses, smaller pupil size, increased scattering of light due to thicker lenses and yellowing of the lenses.<sup>1,2<\/sup>&nbsp;This aging of the eye indicates that an increase in light levels is required to ensure visual acuity.<\/p>","evidence":"<p>While developing a lighting strategy to accommodate the visual acuity of users, it is critical to take into account the tasks conducted, as well as the age of the users. Projects may refer to published recommendations by lighting associations or authorities on using electric lighting design strategies for light levels required on the work plane. Lighting recommendations published by authorities provide a range of lighting levels for different age groups and tasks.<\/p>","implementation":"","impact":"","max_points":0,"concept_id":1737,"slug":"visual-lighting-design-1","gbd_exists":0,"review_summary":null,"citations":"<ol>\r\n\t<li>Pokorny J, Smith VC, Lutze M. Aging of the human lens. Appl Opt. 1987;26(8):1437. doi:10.1364\/AO.26.001437<\/li>\r\n\t<li>Owsley C. Aging and vision. Vision Res. 2011;51(13):1610-1622. doi:10.1016\/j.visres.2010.10.020<\/li>\r\n\t<li>Illuminating Engineering Society. 2020. IES OL-IM-03: Lighting Applications Standards Collection Subscription. https:\/\/store.ies.org\/product\/lighting-applications-standards-collection-subscription\/?v=7516fd43adaa<\/li>\r\n\t<li>European Committee for Standardization. 2021. EN 12464-1:2021. Light and lighting - Lighting of work places - Part 1: Indoor work places. Accessed Febraury February 13, 2024. https:\/\/standards.iteh.ai\/catalog\/standards\/sist\/b1a68cbc-1bdc-4ac2-89e7-0123982763b5\/sist-en-12464-2-2014<\/li>\r\n\t<li>European Committee for Standardization. 2014. SIST EN 12464-2:2014 Light and lighting - Lighting of work places - Part 2: Outdoor work places. Accessed Febraury February 13, 2024. https:\/\/standards.iteh.ai\/catalog\/standards\/sist\/b1a68cbc-1bdc-4ac2-89e7-0123982763b5\/sist-en-12464-2-2014<\/li>\r\n\t<li>International Organization for Standardization. ISO 8995-1:2002 (CIE S 008\/E:2001) - Lighting of work places -- Part 1: Indoor. 2001. https:\/\/www.iso.org\/standard\/28857.html.<\/li>\r\n\t<li>Zheng W. GB 50034-2013 Standard for lighting design of buildings (English Version). https:\/\/books.google.com\/books\/about\/GB_50034_2013_Translated_English_of_Chin.html?id=svamDgAAQBAJ. Published 2013. Accessed April 1, 2018.<\/li>\r\n\t<li>The SLL Lighting Handbook The Society of Light and Lighting. CIBSE; 2018. www.cibse.org. Accessed June 9, 2020.<\/li>\r\n\t<li>U.S. General Services Administration. P100 Facilities Standards for the Public Buildings Service.; 2018. https:\/\/www.gsa.gov\/cdnstatic\/2018 P100 Final 5-7-19_0.pdf.<\/li>\r\n<\/ol>","deleted_at":null,"equivalency_count":7,"faq_count":3,"resource_count":1,"feature_full_name":"L02 Visual Lighting Design","feature_faq_name":"L02 Visual Lighting Design-v2","max_core_points":0,"parts":[{"id":30727,"name":"Provide Visual Acuity","part_number":1,"points":0,"possible_points":null,"core_points":0,"possible_core_points":null,"min_points":0,"rer_points":0,"wor_points":0,"parent_part_id":null,"feature_id":18367,"note":"<p>Multifamily residential projects may achieve WELL Certification at the Bronze or Silver level without testing in dwelling units, but cannot achieve Gold or Platinum without testing in dwelling units. See Sampling Rates for Multifamily Residential in the WELL Performance Verification Guidebook for further details.&nbsp;<\/p>\r\n\r\n<p>Refer to the Performance Verification Guidebook for information on sensor\/testing requirements, required testing duration and compliance calculations.<\/p>","slug":"1-provide-visual-acuity-11","note_position_override":"bottom","new_core_shell":null,"existing_core_shell":null,"new_occupied":null,"existing_occupied":null,"education":null,"retail":null,"mfr":null,"others":null,"photographic_verification":0,"gbd_exists":0,"hospitality":null,"assisted_living":null,"cultural_institutions":null,"public_assembly":null,"deleted_at":null,"na_alternative":0,"na_alternative_text":null,"leed_well":0,"part_prefix":"L02.1","feature_name":"Visual Lighting Design","parent":null,"sub_parts":[{"id":33023,"condition":"OR","part_id":30727,"deleted_at":null,"space_types_included":[{"id":1,"name":"All Spaces","name_plural":"all"}],"space_types_excluded":[{"id":3,"name":"Dwelling Units","name_plural":"dwelling units"}],"options":[{"id":41936,"option_order":1,"name":"Visual lighting design","description":"<p>The following requirements are met:<\/p>","description_alt":null,"space_property":null,"certification":null,"note":null,"sub_part_id":33023,"deleted_at":null,"note_position_override":"top","verification_note":"<p>Technical Document: Design specifications that list the following:<\/p>\r\n\r\n<ul>\r\n\t<li>Lighting reference guideline used.<\/li>\r\n\t<li>Tasks or activities considered for visual lighting design in the project. All tasks and activities regularly undertaken by occupants are considered.<\/li>\r\n\t<li>Illuminance criteria met for each task considered. If occupants with multiple ages ranges are present, the illuminance criteria for the oldest range may be considered.<\/li>\r\n\t<li>Height of work plane or other target of illumination ranges for the majority of occupants.<\/li>\r\n<\/ul>\r\n\r\n<p>AND<\/p>\r\n\r\n<p>Technical Document: Architectural drawings that identify the tasks considered in each room.<\/p>","verification_condition":"AND","requirements":[{"id":120516,"option_id":41936,"requirement_order":1,"description":"<p>All indoor and outdoor spaces (including transition areas) comply with the illuminance thresholds specified in one of the following lighting reference guidelines:<\/p>\r\n\r\n<ol>\r\n\t<li>IES Lighting Library, Lighting Applications Standards Collection.<sup>3<\/sup><\/li>\r\n\t<li>EN 12464-1:2021<sup>4<\/sup> or EN 12464-2:2014.<sup>5<\/sup><\/li>\r\n\t<li>ISO 8995-1:2002(E) (CIE S 008\/E:2001).<sup>6<\/sup><\/li>\r\n\t<li>GB50034-2013.<sup>7<\/sup><\/li>\r\n\t<li>CIBSE SLL Code for Lighting.<sup>8<\/sup><\/li>\r\n<\/ol>","description_alt":null,"deleted_at":null,"photographic_verification":0},{"id":120517,"option_id":41936,"requirement_order":2,"description":"<p>The illuminance thresholds take into consideration the tasks and the age groups of the occupants.<\/p>","description_alt":null,"deleted_at":null,"photographic_verification":0}],"verifications":[{"id":15,"name":"Performance Test","chinese_name":"\u6027\u80fd\u6d4b\u8bd5","is_auditable":0,"scale_type":"Individual","note":null},{"id":26,"name":"Technical Document (Individual)","chinese_name":"\u6280\u672f\u6587\u6863\uff08\u5355\u4f53\uff09","is_auditable":0,"scale_type":"Individual","note":null}],"pvgbs":[{"id":940,"option_id":41936,"name":"Visual Lighting","reporting_compliance":"<ul>\r\n\t<li>The average light levels across a given task must meet the target illuminance throughout the project boundary.<\/li>\r\n\t<li>The lowest light level measured across a given task must be at least half of the target illuminance.<\/li>\r\n<\/ul>","device_requirements":"<ul>\r\n\t<li>All illuminance measurements are to be conducted with a cosine corrected illuminance meter.&nbsp;<\/li>\r\n\t<li>Range: 5-50,000 lux<\/li>\r\n\t<li>Maximum acceptable overall error: &plusmn;5% (at values up to 2000 lux)<\/li>\r\n\t<li>Resolution: 1 lux (at values up to 2000 lux)<\/li>\r\n\t<li>The illuminance meter is calibrated as per manufacturer specifications in an ISO\/IEC 17025:2017 Accredited Calibration Lab, or calibration must be traceable to a National Metrological Institute, such as NIST, NPL or PTB.traceable to a National Metrological Institute, such as NIST, NPL or PTB.<\/li>\r\n<\/ul>","alternative_requirements":null,"alternative_quantity":null,"quantity_override":null,"quantity_core_override":null,"recertification_override":null,"locations_override":null,"quantity_note":"<ul>\r\n\t<li>The measurements must be conducted at various locations within the project boundary, including both interior and exterior spaces (as applicable).<\/li>\r\n\t<li>Measurements are conducted across one floor in projects that consist of one to four floors. If the project has five or more floors, measurements are to be conducted across two floors.<\/li>\r\n\t<li>The floor that is identified for measurements must be regularly used by a representative sample of the occupants. For example, if a project has four floors out of which one consists of the lobby and the other three consist of offices, the measurements must be conducted on one floor that contains offices.<\/li>\r\n\t<li>To identify sampling points, apply a grid with 3 m x 3 m [10 ft x 10 ft] squares&nbsp;across the entire floor that has been identified for measurement.<\/li>\r\n\t<li>Take one measurement per square, up to a maximum of 50 measurements per floor, provided at least three measurements per task are taken within the project (see below).<\/li>\r\n\t<li>Within each square, measurements are to be taken at a point that is representative of the occupant&rsquo;s position. For example, for a workstation, the sampling point would lie at the center of the desk in front of the occupant; for a corridor, the sampling points would be at the center of the corridor.<\/li>\r\n\t<li>Ensure that at least three measurements are taken for each task and\/or application submitted by the project team. Tasks\/applications may include, but are not limited to:\r\n\t<ul>\r\n\t\t<li>Circulation corridor<\/li>\r\n\t\t<li>Reception desk<\/li>\r\n\t\t<li>Aerobic exercise area<\/li>\r\n\t\t<li>Food preparation<\/li>\r\n\t\t<li>Reading and writing in a classroom<\/li>\r\n\t<\/ul>\r\n\t<\/li>\r\n\t<li>This may require multiple measurements in a single grid square or more than 50 measurements per floor.<\/li>\r\n\t<li>All sampling points must be representative of typical occupied areas within the sampling zone.&nbsp;<\/li>\r\n<\/ul>","location_note":"<ul><li>This parameter is measured on the horizontal plane.&nbsp;<\/li><li>Working plane heights and target illumination levels are to be provided by project teams.&nbsp;<\/li><li>This parameter is to be measured using only electric lighting. Take measurements at night to avoid daylight contribution.&nbsp;<\/li><li>If supplemental lighting is used, the lighting should be turned on and positioned as per regular conditions.<\/li><li>The WELL Performance Testing Agent may follow instructions by the project team to turn screens on or off. However, agents are not to alter field conditions in any other way including influencing or controlling lighting automation (changing brightness levels, color or color temperature) and\/or directing the adjustments made by the project team.<\/li><\/ul>","test_method_note":"<ul><li>The measuring instrument is placed in the center of the flat surface of the working plane with the aperture facing upward.<\/li><li>Ensure that the shadow of the WELL Performance Testing Agent does not fall on the measuring instrument while the measurements are taken.<\/li><\/ul>","laboratory_requirement":null}]},{"id":41938,"option_order":2,"name":"Predetermined light levels","description":"<p>The following requirements are met:<\/p>","description_alt":null,"space_property":null,"certification":null,"note":null,"sub_part_id":33023,"deleted_at":null,"note_position_override":"top","verification_note":"<p>Technical Document: Architectural drawings that identifies the tasks considered in each room.<\/p>","verification_condition":"AND","requirements":[{"id":120521,"option_id":41938,"requirement_order":1,"description":"<p>More than 50% of the occupants are under the age of 65.<\/p>","description_alt":null,"deleted_at":null,"photographic_verification":0},{"id":120522,"option_id":41938,"requirement_order":2,"description":"<p>The area of outdoor space within the project boundary is less than 5% of the interior project area.&nbsp;<\/p>","description_alt":null,"deleted_at":null,"photographic_verification":0},{"id":120525,"option_id":41938,"requirement_order":3,"description":"<p>At least 90% of the interior project area is comprised of the following space types and meets the associated illuminance thresholds:<\/p>\r\n\r\n<table border=\"1\" cellpadding=\"1\" cellspacing=\"1\" style=\"width:500px\">\r\n\t<tbody>\r\n\t\t<tr>\r\n\t\t\t<td><strong>Room Types<\/strong><\/td>\r\n\t\t\t<td><strong>Minimum Illuminance Threshold<\/strong><\/td>\r\n\t\t<\/tr>\r\n\t\t<tr>\r\n\t\t\t<td>\r\n\t\t\t<p>Offices<\/p>\r\n\r\n\t\t\t<p>Classrooms<\/p>\r\n\t\t\t<\/td>\r\n\t\t\t<td>\r\n\t\t\t<p>{{well-unit}}30 fc|320 lux{{\/well-unit}} at task surface.<sup>9<\/sup><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t<tr>\r\n\t\t\t<td>\r\n\t\t\t<p>Circulation areas (including lobbies and atria)<\/p>\r\n\r\n\t\t\t<p>Storage spaces<\/p>\r\n\t\t\t<\/td>\r\n\t\t\t<td>{{well-unit}}10 fc|110 lux{{\/well-unit}} at floor level.<sup>9<\/sup><\/td>\r\n\t\t<\/tr>\r\n\t\t<tr>\r\n\t\t\t<td>\r\n\t\t\t<p>Dining areas<\/p>\r\n\r\n\t\t\t<p>Lounges<\/p>\r\n\r\n\t\t\t<p>Restrooms<\/p>\r\n\t\t\t<\/td>\r\n\t\t\t<td>{{well-unit}}10 fc|110 lux{{\/well-unit}} at task surface.<sup>9<\/sup><\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>","description_alt":null,"deleted_at":null,"photographic_verification":0}],"verifications":[{"id":15,"name":"Performance Test","chinese_name":"\u6027\u80fd\u6d4b\u8bd5","is_auditable":0,"scale_type":"Individual","note":null},{"id":26,"name":"Technical Document (Individual)","chinese_name":"\u6280\u672f\u6587\u6863\uff08\u5355\u4f53\uff09","is_auditable":0,"scale_type":"Individual","note":null}],"pvgbs":[]}]},{"id":33029,"condition":"OR","part_id":30727,"deleted_at":null,"space_types_included":[{"id":3,"name":"Dwelling Units","name_plural":"dwelling units"}],"space_types_excluded":[],"options":[{"id":41945,"option_order":1,"name":"Promote Visual Acuity","description":"<p>The following requirements are met:<\/p>","description_alt":null,"space_property":null,"certification":null,"note":null,"sub_part_id":33029,"deleted_at":null,"note_position_override":"top","verification_note":"<p>Technical Document: Design specifications that contain the following:<\/p>\r\n\r\n<ul>\r\n\t<li>Lighting reference guideline used<\/li>\r\n\t<li>Tasks or activities considered for visual lighting design in the project<\/li>\r\n\t<li>All tasks and activities regularly undertaken by occupants are considered<\/li>\r\n\t<li>Illuminance criteria met for each task considered. If occupants within multiple age ranges are present, the illuminance criteria for the oldest range may be considered<\/li>\r\n\t<li>Height of work plane or other target of illumination ranges for the majority of occupants<\/li>\r\n<\/ul>\r\n\r\n<p>AND&nbsp;<\/p>\r\n\r\n<p>Technical Document: Architectural drawings that contain the following: Spaces where lighting is installed and spaces where lighting is not installed For spaces where lighting is not installed, specifications, quantity and location of light fixtures<\/p>\r\n\r\n<p>AND<\/p>\r\n\r\n<p>Technical Document: Architectural drawings that identify the tasks considered in each room.<\/p>","verification_condition":"AND","requirements":[{"id":120537,"option_id":41945,"requirement_order":1,"description":"<p>Lighting is installed in kitchens and bathrooms to comply with the illuminance thresholds specified in one of the following lighting reference guidelines:<\/p>\r\n\r\n<ol>\r\n\t<li>IES Lighting Library, Lighting Applications Standards Collection.<sup>3<\/sup><\/li>\r\n\t<li>ISO 8995-1:2002(E) (CIE S 008\/E:2001).<sup>6<\/sup><\/li>\r\n\t<li>&nbsp;<!--[endif]-->GB50034-2013.<sup>7<\/sup><\/li>\r\n\t<li>CIBSE SLL Code for Lighting.<sup>8<\/sup><\/li>\r\n<\/ol>","description_alt":null,"deleted_at":null,"photographic_verification":0},{"id":120539,"option_id":41945,"requirement_order":2,"description":"<p>For spaces where lighting is not installed, the following is provided to all tenants:<\/p>\r\n\r\n<ol>\r\n\t<li>Illuminance thresholds for common tasks conducted in spaces<\/li>\r\n\t<li>Specifications, quantity and location of light fixtures required to meet light levels based on sample layout&nbsp;<\/li>\r\n<\/ol>\r\n\r\n<p>&nbsp;<\/p>","description_alt":null,"deleted_at":null,"photographic_verification":0}],"verifications":[{"id":15,"name":"Performance Test","chinese_name":"\u6027\u80fd\u6d4b\u8bd5","is_auditable":0,"scale_type":"Individual","note":null},{"id":26,"name":"Technical Document (Individual)","chinese_name":"\u6280\u672f\u6587\u6863\uff08\u5355\u4f53\uff09","is_auditable":0,"scale_type":"Individual","note":null}],"pvgbs":[]}]}],"on_sites":[],"annotated_documents":[],"letter_of_assurances":[],"part_guidances":[{"id":33141,"part_id":30727,"category":"WELL Core","sub_category":null,"rating_note":null,"alignment_note":null,"doc_guidance":"Meet these requirements in non-leased spaces. To earn an additional point, also meet these requirements in leased spaces, which requires access to at least 10% of leased space for testing (identified by the project).","points":"1"}],"methods":[]}],"ihmes":[],"sdgs":[{"id":3,"name":"3: Good Health and Well-being","max_points":0},{"id":4,"name":"4: Quality Education","max_points":0},{"id":7,"name":"7: Affordable and Clean Energy","max_points":0},{"id":8,"name":"8: Decent Work and Economic Growth","max_points":0},{"id":11,"name":"11: Sustainable Cities and Communities","max_points":0}]}