Industry pushes 1000+ nit displays. Your eyes need 100-150 nits in office lighting. What's going wrong? The display industry is locked in a brightness arms race. VESA just added a DisplayHDR True Black 1000 tier. Conference LED screens now recommend 800-1200 nits. Premium displays push 1600+ nits peak brightness. dvLED screens have their place, but they're signage technologies trying to make a narrative in workspaces. They only work when their performance matches user needs. Here's what ergonomics research actually recommends: in typical office lighting of 300-500 lux, display brightness should be 100-150 cd/m² (nits) - matched to white paper brightness under the room lighting. We're not going to the cinema, we're designing workspaces where people can work all day, maintaining focus. The Mismatch Problem. Walk into most meeting rooms and displays run at factory defaults - typically 300-400 nits or higher. Under office lighting, this creates asthenopia ('eye strain'), headaches, and viewing fatigue. Users complain presentations are 'harsh', yet we keep specifying brighter displays. What Actually Matters. Brightness is what you perceive. Luminance is what you measure. Contrast is what determines image quality - the relationship between brightest whites and darkest blacks. AVIXA's ISCR standard (which I co-authored) defines this properly: meeting rooms require 15:1 contrast ratio for 'Basic Decision Making' content. That's a contrast specification, not brightness. If black levels are poor, you're forced to push white levels dangerously bright to maintain usable contrast. Teams, Zoom, Google, Webex push content into windowed displays. When critical content sits within a window, black level performance becomes crucial for readability. The Fix. Environmental lighting significantly impacts perceived black depth. Even OLED panels lose 'infinite' contrast in bright offices because black levels struggle against reflected light. For meeting rooms, specify black level performance first (aim for 0.3 nits or lower), then work backwards to determine appropriate luminance for your environment. Use ALR projection screens that deliver 7x better contrast in challenging lighting. Measure static contrast ratios using checkerboard patterns, not sequential brochure numbers. This is why Environment leads GJC's EASE methodology - lighting design determines whether display technology can succeed. At GJC we help organisations apply these standards-based principles through consulting and training (EASE and UX Design with Adam Banks). My bi-weekly newsletter 'Industry Standard' explores what actually works in AV - backed by standards and evidence. Subscribe: https://lnkd.in/ekQ3AdCb What's your biggest challenge with display performance in meeting rooms? #microsoftteamsrooms #avtweeps #EASEmethodology #hybridmeetings #avusergroup #ltsmg #schoms #avixa #AVMag #InstallationMagazine #InAVate
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Drop the white. Your clean background is creating visual friction. We tend to equate pure white with professionalism. But for a massive part of your ecosystem, that stark background is not professional. It is a strobe light. I have posted about this before. The feedback from UX researchers, designers, and accessibility advocates helped expand this landscape significantly. The clinical reality is that high contrast drains executive function. You force users to burn cognitive fuel just to stabilize the image, leaving less fuel to actually understand the content. Here is an updated guide to cultivating visually accessible digital environments. 1/ The Strobe Light (Stark White) → The Code: #FFFFFF → The Issue: For the 14% of the population with Scotopic Sensitivity, high contrast black text on pure white causes text to vibrate. It acts as an optical strobe light, washing out the letters. → The Environment: Pair this stark hex code with harsh fluorescent office lighting, and you actively trigger visual migraines and severe optical drag. 2/ The Deep Shade (Pure Black) → The Code: #000000 → The Issue: Dark Mode is not a universal cure. For the 33% of people with astigmatism, pure black backgrounds cause halation. The text becomes fuzzy, bleeds into the dark, and forces the eyes to overwork just to focus. 3/ The Soft Sun (Optimal Contrast) → The Standard: The British Dyslexia Association explicitly recommends avoiding bright white. You want soft, not stark. → The Metric: Accessibility experts note that an ideal luminance contrast ratio sits between 7 to 1 and 15 to 1. Going over 15 to 1 becomes difficult to tolerate. 4/ The Solarized Upgrade → The Codes: Background FDF6E3 with Text 657B83. → The Science: Lowers contrast gain. It mimics reading on a sunny afternoon rather than staring into a flashlight. 5/ The Sepia Upgrade → The Code: Background F4ECD8. → The Science: Provides a cozy warmth that reduces blue light exposure and relaxes the ciliary muscles in the eye. 6/ The Cream Upgrade → The Codes: Background FFFFE5 or FAFAFA. → The Science: Replaces the harsh #FFFFFF and #000000 with a gentle off white. Reduces glare while preserving a familiar paper feel. This is a standard recommendation for dyslexic readers. 7/ Expanding the Ecosystem → The Goal: Normalize customization. The goal is never to force everyone into a sepia box. → The Practice: Build websites that respect custom user style sheets. Ensure your contrast choices do not break screen reader compatibility. Empower user agency so individuals can adjust the lighting for their own specific neurobiology. White space is important. But it does not have to be white. Check your recent slide deck or website. Are you planting visual friction, or are you cultivating flow?
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Upward Light Ratio (ULR): The Challenge in Façade Lighting Upward light emitted into the atmosphere causes Sky Glow, which obscures the stars and harms the nocturnal environment. For this reason, international standards set strict maximum values for the Upward Light Ratio (ULR) that must not be exceeded, Standard Maximum ULR (Rul) in Zone E4 High Brightness (City Centers) European Standard (EN 12464-2) 25% International Commission on Illumination (CIE 150:2017) 15% Essential Measures for Façade Lighting To maintain these values or achieve even lower levels, specific measures must be taken during the design of façade lighting: Using Narrow Beam Angles: Selecting precise lenses helps concentrate light on architectural elements (such as columns) and prevents it from scattering beyond the building's boundaries. Confining Illumination within the Building Mass: Luminaires should be aimed so that the light beam ends at the edge of the façade or the "cornice," preventing light from being projected directly into the sky. Reducing Emissions to the Sky: Implementing these technical strategies ensures that decorative lighting does not contribute to urban light pollution. The image below clearly demonstrates the difference between two design approaches: The Incorrect Option (Top Right): The light exceeds the boundaries of the columns and continues toward the sky, significantly increasing the ULR and violating both CIE and EN standards. The Correct Option (Bottom Right): The illumination is precisely confined within the arches and on the columns, achieving minimal emissions to the sky and ensuring compliance with international benchmarks. #LightingDesign #FacadeLighting #ArchitecturalLighting #LightPollution #DarkSky #ULR #Sustainability #CIE150 #EN12464 #SaveTheNight
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The Unified Glare Rating (UGR) is a standardized metric used to quantify discomfort glare from luminaires within an indoor lighting environment. It provides an objective measure of how likely a lighting installation is to cause visual discomfort to occupants. The UGR value is calculated based on several parameters, including the luminance of each luminaire, its solid angle, background luminance, and the position of the observer. Typical UGR Thresholds: • <10 → Imperceptible glare • 10–19 → Suitable for offices, classrooms, and task areas • 19–25 → Acceptable for circulation zones or industrial settings • >25 → Excessive glare; lighting redesign recommended ⸻ Strategies to Minimize Glare: 1. Use luminaires with controlled optical systems (e.g., anti-glare lenses, baffles, or louvers). 2. Optimize luminaire placement and orientation to avoid direct light in the field of view. 3. Employ indirect lighting techniques — reflect light off ceilings or walls to achieve uniform illumination. 4. Balance luminance ratios between task surfaces, backgrounds, and surroundings. 5. Select surface finishes with low reflectance to reduce specular reflections. 6. Ensure adequate contrast control by integrating both ambient and task lighting. ⸻ Key Takeaway: Maintaining a UGR below 19 in workplaces significantly enhances visual comfort, productivity, and user well-being. Effective glare control isn’t just about compliance — it’s a core element of high-quality lighting design. #LightingDesign #UGR #UnifiedGlareRating #GlareControl #VisualComfort #InteriorLighting #ArchitecturalLighting #LightingEngineering #IlluminationDesign #AntiGlare #LightingStandards #HumanCentricLighting #OfficeLighting #LightingQuality #Luminaires #LightingSolutions #LightingDesignTips #LightingEfficiency #BuildingDesign #WorkplaceLighting
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Retail lighting isn’t “decor.” It’s decision architecture. I keep seeing viral posts claiming exact lift numbers (23% higher tickets, 35% longer dwell, etc.). Lighting absolutely influences behavior - but the real science is more nuanced than a single percentage. Here’s what actually matters in-store: Color temperature (CCT) shapes the mindset Warm light (think ~2700–3000K) is generally perceived as comfortable and inviting. Cooler/neutral light (3500–5000K) reads cleaner, more clinical, and more “task-focused.” That perception can change how shoppers feel about the environment - and feelings drive behavior. Brightness & contrast drive attention Your eye goes where the light goes. Retail lighting isn’t just “how bright,” it’s the ratio: ambient light sets the baseline, and accent light creates focal points (newness, margin items, outfit-building statements, signage). More contrast can increase visual interest and product engagement; flat lighting makes product look flat. Color rendering is the silent sales lever If the light distorts color, you distort confidence. High color quality (not just “bright”) helps shoppers judge fabrics, skin tones, finish, and true color - reducing doubt, returns, and “I’ll think about it.” This is why lighting specs shouldn’t stop at CCT; color quality metrics matter. Lighting affects emotion - and emotion affects intent Peer-reviewed retail research shows lighting can influence pleasure/arousal in the space, which then influences shopping intentions. In plain English: the environment can put the customer in a “browse and buy” mode… or a “get in, get out” mode. Great operators use lighting like a playbook Grocery: warmer, appetizing light where you want comfort and cravings; cleaner, brighter light where freshness and inspection matter. Tech / modern specialty: neutral-to-cool, high color quality for precision and product truth. Fashion: layered light to sculpt texture, elevate color, and create “try-it-on” energy. Bottom line: customers don’t just shop product - they shop certainty. Lighting is one of the fastest ways to increase clarity, elevate perception, and guide flow without moving a single fixture. If you walked your store tonight with the sales report in one hand and a light meter in the other… what would you change first? Its pretty technical, but smart operators use every available advantage to drive performance.
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Your office lighting may be quietly degrading your employees’ vision. A study published in Scientific Reports found that workers under standard LED lighting improved color contrast sensitivity by 25% after just 2 weeks of supplemental broad-spectrum light and maintained those gains for at least 6 weeks after the supplement was removed. The mechanism is simple. Standard LEDs are spectrally restricted to 350–650nm, optimized for lumens rather than biology. The near-infrared wavelengths (700nm+) that retinal mitochondria depend on for ATP production are simply absent. Deep-floorplate buildings with IR-blocking window films compound the problem, leaving occupants with zero exposure to those wavelengths for entire workdays. Retinal metabolism naturally declines with age, making this particularly relevant for workforces over 40. Standard LED environments may be accelerating that decline rather than staying neutral. The fix the researchers used wasn’t complicated: 60W incandescent desk lamps at workstations. The visible contribution was negligible against the overhead LEDs. The infrared did the work. If incandescent is off the table, low-voltage halogen is a viable alternative. Undervolting shifts spectral output further into NIR, extends filament life, and reduces energy use. “Photo-nutrition” is a useful frame here. We’ve spent decades optimizing office light for visibility. We’re just starting to understand what we’ve been leaving out. What’s your current office lighting setup, LED-only or something hybrid? https://lnkd.in/dUQMyrvc #HumanCentricLighting #OfficeWellness #LightingDesign #WorkplaceHealth #PhotoNutrition #Photobiomodulation
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Most sustainability conversations in lighting stop at watts. Watts per square foot. Lumens per watt. Energy code compliance. All real numbers, and all incomplete. They tell you how a fixture performs on day one, not whether it survives to year ten. Here is what I keep seeing on projects. A fixture rated at 140 lm/W looks like the responsible choice, until it fails at 30,000 hours, twenty feet up in a ceiling. Now the efficiency story becomes a cost story: lift rental, labor, ceiling disruption, full replacement, disposal. One failed fixture can quietly carry five times its hidden cost. Efficiency without longevity is just delayed waste. The metric almost nobody specifies for is serviceability. Can you repair it, or are you forced to tear it out and start over? That one question decides whether a fixture is a long term asset or a scheduled failure sitting on a calendar you do not control. So when I specify, I read it in this order. Longevity first. Repairability second. Efficiency serves both, it does not replace them. A slightly lower lm/W figure with an 80,000 hour lifespan and serviceable components beats a headline efficiency number that demands ceiling demolition in year four, every time. Energy efficiency is the starting point, not the finish line. If your strategy stops at watts, you are optimizing for the wrong variable. #codelumen #lightingdesign #architecturallighting #sustainabledesign #realestatedevelopment #assetmanagement #facilitiesmanagement
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"Masterclass on the Importance of Lighting," - Creating stunning Interiors. As Architect Dante Alexander explains... Light is the Soul of Interior Design... Light is not just a utility; it's the single most transformative element in any design. It has the power to define a mood, highlight architectural features, alter the perception of space, and even influence our well-being. This Design is a perfect case study, demonstrating masterful use of various lighting techniques. 1. The Three Layers of Lighting... Effective lighting design is built on three fundamental layers: ambient, task, and accent. This Design is a beautiful example that illustrates all three. * Ambient Lighting: This is the primary source of light that provides overall illumination for a room. It's the general "glow." Ambient light comes from several sources. The recessed lighting in the ceiling and the hidden cove lighting along the ceiling's curves provide a soft, even wash of light. This prevents harsh shadows and creates a serene, welcoming atmosphere. Notice how the ceiling itself becomes a design feature because of this lighting. Task Lighting: This is focused, functional lighting meant to help with specific activities. In the kitchen, this is the under-cabinet lights; in a reading nook, a floor lamp. The principle is to provide clear, direct light where it's needed most. Accent Lighting: This is the dramatic, artistic layer. It's used to draw attention to specific features and create visual interest. The glowing, chairs: These are stunning examples of accent lighting. They are not just functional seats; they are illuminated sculptures that command attention and create a focal point. 2. The Psychology of Light Beyond function, light has a profound psychological effect on how we feel in a space creating moods. Warm vs. Cool Light: The color temperature of light (measured in Kelvin) is critical. Warm light (lower Kelvin) has a yellowish-red tone and is associated with relaxation, coziness, and intimacy. Cool light (higher Kelvin) is bluer and is often used for concentration and a more modern, work area. Highlighting and Shadows: Light can sculpt a space. By strategically placing light sources, you can create depth and more dimension. 3. Enhancing the Space with Natural and Artificial Light The most successful interior designs blend natural light with a well-planned artificial lighting scheme. By mastering the three layers of light and understanding its psychological impact, you can transform any space. This Design of a Living room is a testament to this philosophy: it's not just a room with lights; it's a room designed with light, where every illuminated element contributes to a cohesive, stunning, and emotionally healing experience. Enjoy... Design By: Architect Dante Alexander
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Good morning team, As the seasons shift, so does the amount of daylight we experience each day. If you're in the Southern Hemisphere, your days will begin to get longer, bringing extended sunlight and warmer temperatures. For those of us in the Northern Hemisphere, the opposite is true — our days will get shorter, mornings will stay darker, and evenings will lose light much faster. These changes may seem minor, but in our line of work, lighting and visibility are critical factors in maintaining safety and productivity. The Impact of Changing Light: -Reduced visibility during early mornings and late afternoons can increase the risk of slips, trips, and falls — especially around uneven terrain, stairs, and outdoor worksites. -Fatigue can set in faster as our bodies adjust to the new light cycle. Shorter days often affect energy levels, focus, and alertness. -Glare and shadows caused by low sun angles can distort depth perception, particularly when operating vehicles or heavy machinery. -Lighting systems—both indoor and outdoor—must now do the heavy lifting to maintain safe visibility. Tips and Inspections During This Transition: 🔦 Inspect and Adjust Lighting -Check all outdoor lighting systems (parking areas, walkways, entry points) for burnt-out bulbs or timers that need adjustment. -Ensure motion sensors and automatic timers are synchronized with new sunrise and sunset times. -Verify that task lighting is adequate for indoor workspaces and inspection areas. 😴 Combat Fatigue Encourage frequent stretch and hydration breaks, especially for those working long shifts or early hours. -Promote consistent sleep schedules and remind employees that reduced daylight can affect alertness. -Be observant — if a team member seems more tired or less focused, consider rotating duties or taking a short rest period. 🚗 Be Cautious on the Road -Remind drivers to use headlights during dawn and dusk hours. -Watch for increased pedestrian traffic in low-light conditions. -Keep windshields clean to minimize glare from headlights or the setting sun. Remember: Lighting isn’t just about visibility — it’s about keeping people safe. Staying alert, adjusting to changing light conditions, and ensuring proper illumination can prevent incidents before they occur. P.S.: If you haven’t already, review your monthly inspection checklist and add a section for seasonal lighting adjustments. These few minutes of attention can make a world of difference. "Safety Takes Time, so Take the Time for Safety" Dwayne Smith
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