What is WELL™?

ILLUMINATE THE SOUL® WITH HUMAN-CENTRIC LIGHTING AND ACOUSTIC SOLUTIONS.

Established by the International WELL Building Institute™ (IWBI™), the WELL Building Standard™ is a rating-based system serving as a new global benchmark for healthy buildings and communities. According to the IWBI, “the WELL Building Standard™ is the premier standard for buildings, interior spaces and communities seeking to implement, validate and measure features that support and advance human health and wellness.”

ALW is committed to providing the highest quality luminaires for a multitude of applications, with many versatile lighting and acoustic solutions that contribute to satisfying the WELL Building Standard™.

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ILLUMINATE THE SOUL™ WITH THE WELLNESS COLLECTION BY ALW
A CURATED SELECTION OF LIGHTING & ACOUSTIC SOLUTIONS FOCUSED ON WELL-BEING

WELL™ at a Glance

WELL™ v1 Features

WELL™ v2 Features

Feature 54 – Circadian Lighting Design

Pre-Condition

Objective: To support circadian health by setting a minimum threshold for daytime light intensity.

Light is one of the main drivers of the circadian system, which starts in the brain and regulates physiological rhythms throughout the body’s tissues and organs, affecting hormone levels and the sleep-wake cycle. Circadian rhythms are kept in sync by various cues, including light which the body responds to in a way facilitated by intrinsically photosensitive retinal ganglion cells (ipRGCs): the eyes’ non-image-forming photoreceptors. Through ipRGCs, lights of high frequency and intensity promote alertness, while the lack of this stimulus signals the body to reduce energy expenditure and prepare for rest. The biological effects of light on humans can be measured in Equivalent Melanopic Lux (EML), a proposed alternate metric that is weighted to the ipRGCs instead of to the cones, which is the case with traditional lux. During Performance Verification, EML is measured on the vertical plane at eye level of the occupant.
EML Calculator Spreadsheet (.xlsx)
Part Location Requirement
1 Work Areas ≥ 200 EML (at ≥ 75% of workstations) OR
≥ 150 EML (at 100% of workstations)
2 Living Environments Daytime: ≥ 200 EML
Nighttime: ≤ 50 EML
3 Breakrooms ≥ 250 EML
4 Learning Areas ≥ 125 EML (at ≥ 75% of desks) for at least 4hrs/day OR
Meet Vertical (Ev) Targets in Table 3 of IES-ANSI RP-3-13
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Feature 55 – Glare Control

Pre-Condition

Non-diffuse, bright indoor lights create uneven levels of brightness in the visual field. The resulting glare, defined as “excessive brightness of the light-source, excessive brightness-contrasts and excessive quantity of light”, can cause visual discomfort (discomfort glare), fatigue, visual impairment and even injury (disability glare), and can be attributed to either direct or reflected glare. In the case of glare caused by electric light sources, lamps should be shielded based on their luminance. This quantity, often given in cd/m², can be measured directly or calculated from lighting specification sheets with sufficient detail. Light fixtures of greater luminous intensity require a greater shielding angle to reduce the likelihood of creating direct glare for occupants.

Part 1: Luminaire Shielding

Required shielding angles with respect to luminance:

LUMINANCE SHIELDING ANGLE, α
(α = 90 – Cutoff Angle)
< 20,000 cd/m2 (Include reflected sources) No shielding required
20,000 cd/m2 to 50,000 cd/m2 15º
50,000 cd/m2 to 500,000 cd/m2 20º
> 500,000 cd/m2 30º

Part 2: Glare Minimization

At workstations, desks, and other seating areas in regularly occupied spaces, one of the following requirements must be met:

  1. Luminaires more than 53º above the center of view (degrees above horizontal) have luminances less than 8,000 cd/m2.
  2. Workstations, desks, and other seating areas achieve a UGR of 19 (or less).
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Feature 58 – Color Quality

Optimization


Color quality is a function of the spectral output of a light source, the spectral absorbance/reflectance of an object, and the sensitivity of the eye’s cone photoreceptors to different wavelengths of light, which we perceive as color. Color quality impacts visual appeal and can either contribute to or detract from occupant comfort. Poor color quality can reduce visual acuity and the accurate rendering of illuminated objects.

For instance, foods, human skin tones and plants may appear dull or unsaturated under lights that have low color quality metrics. Color rendering index (CRI) is a common way to measure color quality, capturing R1-R8 metrics. R9, while not always reported, is also included as part of this feature, as R9 values further take into consideration how we perceive the saturation of warmer hues.

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Feature 60 – Automated Shading & Dimming Controls

Optimization


Design features such as adjustable window shades and lights with dimmers must be actively managed to be effective. Automated controls can help to ensure that these systems continually operate as intended and meet intended benefits such as glare avoidance and energy reduction. Furthermore, setting these features to automatically adjust can greatly contribute to comfort without disrupting occupants from other tasks.

Part 2: Responsive Light Control

The following requirements must be met in all major workspace areas:

  1. All lighting (except decorative fixtures) is programmed using occupancy sensors to automatically dim to 20% or less (or switch off) when the zone is unoccupied.
  2. All lighting (except decorative fixtures) has the capacity and is programmed to dim continuously in response to daylight.
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Feature 78 – Reverberation Time

Optimization

Reverberation time, or RT60, is a metric which describes the length of time taken for a sound to decay by 60 dB from its original level. Optimal reverberation times vary depending on room volume, intended use of the space and the frequency of transmitted sound. In spaces with high reverberation times, the sounds of voices and footsteps take longer to dissipate, contributing to higher levels of ambient noise. The noise produced by reverberation can decrease speech intelligibility and in some situations cause additional stress. This performance specification can be met through the use of sound-absorbing materials on various surface and design elements.

Part 1: Reverberation Time

The following spaces have maximum reverberation time (RT60) as described:

  1. Conference Rooms: 0.6 seconds
  2. Open Workspaces: 0.5 seconds

Part 2: Reverberation Time for Learning Spaces

Reverberation time measurements for learning spaces meet the following criteria:

  1. Spaces less than or equal to 280 m3 [10,000 ft3]: less than 0.6 seconds
  2. Spaces greater than 280 m3 [10,000 ft3], and equal to or less than 570 m3 [20,000 ft3]: less than 0.7 seconds
ALW - Acoustics - Harmonic Collection - Office
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Feature 80 – Sound Reducing Surfaces

Optimization

Proper design and construction are not always enough to achieve acoustic comfort in buildings. Sources that contribute to acoustic dissatisfaction such as sound transmission from internal and external sources, footfall noise and voices from adjacent spaces are difficult to control. However, sound reduction treatments that incorporate absorptive surfaces, such as wall panels, ceiling baffles and surface enhancements can help with reverberation management and improve acoustic comfort. The noise reduction coefficient (NRC) of a material is an average value that determines its absorptive properties. The larger the NRC value, the better the material is at absorbing sound under standardized conditions.

ALW - Acoustics - Harmonic Collection - Library

Part 3: School Ceilings

The following spaces, if present, have ceilings that meet the specifications described:

  1. Spaces less than 570 m³ [20,000 ft³]: NRC of at least 0.7 for the entire surface area of the ceiling (excluding lights, skylights, diffusers and grilles).

Part 1: Ceilings

The following spaces, if present, have ceilings that meet the specifications described:

  1. Open Workspaces: minimum NRC of 0.9 for the entire surface area of the ceiling (excluding lights, skylights, diffusers, beams, joists, and grilles)
  2. Conference and teleconference rooms: minimum NRC of 0.8 on at least 50% of the surface area of the ceiling (excluding lights, skylights, diffusers, beams, joists, and grilles).

Part 2: Vertical Surfaces

The following spaces, if present, have vertical surfaces that meet the NRC specifications described:

  1. Enclosed offices, conference and teleconference rooms: minimum NRC of 0.8 on at least 25% of the surface area of interior surrounding walls.
  2. Open workspaces: minimum NRC of 0.8 on at least 25% of the surface area of the surrounding walls.
  3. Partitioned office spaces: partitions reach at least 1.2 m [48 inches] and have a minimum NRC of 0.8.
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Feature L03 – Circadian Lighting Design

For All Spaces | Optimization | 3 PTS MAX

Objective: The WELL feature L03 requires projects to provide users with appropriate exposure to light for maintaining circadian health and aligning the circadian rhythm with the day-night cycle.

EML Calculator Spreadsheet (.xlsx)
Electric Light Only Electric Light and Daylight Points
At least 150 EML [136 melanopic equivalent daylight D65] or The project achieves at least 120 EML [109 melanopic equivalent daylight D65] with electric light and at least 2 points in Feature L05: Enhanced Daylight Access. 1
At least 240 EML [218 melanopic equivalent daylight D65] or The project achieves at least 180 EML [163 melanopic equivalent daylight D65] with electric light and at least 2 points in Feature L05: Enhanced Daylight Access. 3

COMPATIBLE SOLUTIONS

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Feature L04 – Glare Control

For All Spaces | Optimization | 3 PTS MAX

Objective: The WELL feature L04 Glare Control requires projects to manage glare by using a combination of strategies such as calculating of glare, choosing appropriate light fixtures for the space and using shading techniques. Space planning and lighting design can minimize the amount of glare experienced by individuals in the space. For electric lighting, the light source, type of luminaires used and lighting layout can lead to reduced glare.

LUMINANCE SHIELDING ANGLE, α
(α = 90 – Cutoff Angle)
< 20,000 cd/m2 (Include reflected sources) No shielding required
20,000 cd/m2 to 50,000 cd/m2 15º
50,000 cd/m2 to 500,000 cd/m2 20º
> 500,000 cd/m2 30º
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Feature L07 – Electric Light Quality

Objective: The WELL feature L07 Electric Light Quality requires projects to consider characteristics of electric light used in the space such as color rendering, color quality and flicker.

Part 1: Ensure Color Rendering Quality

For All Spaces Except Circulation Areas | Optimization | 1 PT MAX

METRIC THRESHOLD
CRI CRI > 90
CRI, R9 CRI > 80 with R9 > 50
IES TM-30-18 IES Rf ≥ 78, IES Rg ≥ 100, -1% ≤ IES Rcs,h1 ≤ 15%

Note: CRI = Ra

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Part 2: Manage Flicker

For All Spaces | Optimization | 1 PT MAX

COMPATIBLE OPTIONS
All ALW products with the following driver selections meet this criteria:

Driver Description
0/10V/S 0-10V Standard Dimming to 10% or 5% (depending on product)
0/10V/1% 0-10V Dimming to 1%
DALI DALI flicker-free dimming to 0% (1% with Lutron Vive)
DMX DMX flicker-free dimming to 0%
ECOSYS1 Lutron (LDE1) Hi-lume 1% Ecosystem LED driver with Soft-on, Fade-to-Black dimming technology
ECOSYS5 Lutron (LDE5) 5-Series Ecosystem LED driver (dims to 5%)
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Feature S04 – Sound Absorption

Objective: The WELL feature S04 requires steps be taken to address acoustical comfort by assigning requirements for surface finishes and reverberation time depending on the room functionality. Low reverberation times support speech intelligibility and conducive to focus.

Part 1: Meet Thresholds for Reverberation Time

For All Spaces | Optimization | 1 PT MAX

ROOM TYPE SIZE RT(60) (seconds)
Conference Rooms N/A < 0.6
Classrooms < 280 m³ [10,000 ft³] < 0.6
Between 280 m³ [10,000 ft³] and 570m³ [20,000 ft³] 0.5 to 0.8
> 570 m³ [20,000 ft³] 0.6 to 1.0
Lecture Halls < 280 m³ [10,000 ft³] < 0.7
Between 280 m³ [10,000 ft³] and 570m³ [20,000 ft³] 0.6 to 0.9
> 570 m³ [20,000 ft³] 0.7 to 1.3
Music rehearsal spaces < 280 m³ [10,000 ft³] < 1.1
Between 280 m³ [10,000 ft³] and 570m³ [20,000 ft³] 1.0 to 1.4
Fitness facilities < 280 m³ [10,000 ft³] 0.7 to 0.8
Between 280 m³ [10,000 ft³] and 570m³ [20,000 ft³] 0.8 to 1.1
> 570 m³ [20,000 ft³] 1.0 to 1.8

Part 2: Implement Sound Reducing Ceilings

For All Spaces | Optimization | 1 PT MAX

SPACE TYPE NRC/ αwMin
Open Workspaces
Enclosed Offices
Dining Spaces
0.7 for at least 75% of available ceiling area
Conference Rooms
Classrooms
0.7 for at least 50% of available ceiling area
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