Your team may not need more coffee. They may need better lighting. Lighting that’s too harsh, too dim, or the wrong color can quietly drain focus all throughout the day.
A Closer Look At…
→ How office lighting got complicated
→ Common lighting mistakes that hurt productivity
→ The science behind brightness, color temperature, glare, CRI, and flicker
→ Easy ways to improve your workspace with better lighting choices
A Quick Look Back
For most of the 20th century, office lighting was fairly straightforward. First there was incandescent, then fluorescent, with performance measured in watts and foot-candles. Today’s LEDs offer far more control over brightness, color, and distribution, allowing lighting to be tailored to specific tasks and environments. As a result, the conversation has shifted toward lumens, correlated color temperature (CCT), and color quality. If you’re still selecting bulbs based on wattage or using a single color temperature throughout the office, you could be limiting comfort, focus, and productivity.
(See the U.S. Department of Energy’s consumer guidance on choosing light and labels.)
U.S. DOE – Energy Saver
5 Ways Your Lighting May Be Working Against You
1.The wrong color temperature at the wrong time
Cool, blue-rich light tends to promote alertness and focus earlier in the day, while warmer light can create a more comfortable environment later on. When color temperature doesn’t align with the time of day, whether it’s a warm glow in the morning or a cool daylight effect late in the afternoon, productivity and visual comfort can suffer. NIH – Circadian Rhythms
2.Too dim or too bright
Desks that are too dim can contribute to eye strain, while overly bright spaces may lead to squinting and visual fatigue. The most effective workplaces provide light levels that match the task at hand rather than applying the same lighting everywhere. The Illuminating Engineering Society (IES) recommends tailoring illuminance levels to both the work being performed and the needs of the people using the space.
3.Glare and bad contrast
Bare LEDs, glossy desktops, and poorly positioned downlights can create distracting reflections that make it harder to read and focus, even when a space appears well lit. Using indirect lighting, diffusers, and matte finishes can help reduce glare, improve contrast, and keep text and screens easier to see. OSHA Computer Workstations eTool: Workstation Environment
4.Low CRI (poor color quality)
Low-quality lighting can distort color perception and reduce visual clarity, increasing the effort required to see and interpret detail. Higher color quality such as CRI 90+ or newer metrics like TM-30 supports more accurate and comfortable viewing. This is especially important in spaces where people are reading, collaborating, or evaluating materials. Illuminating Engineering Society (IES)
5.Flicker and unstable dimming
Flicker from low-quality drivers or outdated dimmers can cause headaches and reduce focus. This rapid fluctuation in light output, known as temporal light modulation, is often invisible but still affects visual comfort. Choosing compatible lamps and controls helps keep dimming smooth and lighting stable. U.S. Department of Energy Energy Saver – Lighting Controls
Reflections from windows, glossy desks, or poorly positioned downlights can make screens and printed materials harder to read, even when a space appears well lit.
Comfortable workplaces layer ambient and task lighting to create even illumination, reduce glare, and support focused work throughout the day.
How To Fix It
- Use the right light in the right place
Layer ambient and task lighting instead of relying on overhead light alone. Keep ceiling light comfortable and glare-free, then add desk or under-shelf lighting where detailed work happens. Aim for consistent brightness across the visual field. - Control glare at the source
Re-aim downlights so they do not shine directly into screens, add diffusers where needed, and choose matte work surfaces. Position monitors perpendicular to windows to reduce reflections and visual strain. - Prioritize quality metrics
Look for CRI 90+ or strong TM-30 performance for accurate color rendering. When evaluating products, use lumens and CCT from the Lighting Facts label rather than wattage alone.
FTC Lighting Facts label helps standardize these comparisons. - Match LEDs with the right controls
Use LED-rated dimmers, often reverse-phase or ELV, or smart controls verified for compatibility with your specific lamps. Poorly matched controls are a common cause of flicker and uneven dimming. - Standardize on reliable product lines
High-CRI, well-binned LEDs from reputable manufacturers such as EmeryAllen help maintain consistent color, low flicker, and smooth dimming so workspaces feel uniform and comfortable.
When Lighting Works With People, Not Against Them
Productivity slumps often trace back to five fixable culprits: mistimed color, poor light levels, glare, low color quality, and flicker. The solution is to tune correlated color temperature (CCT) to the time of day, layer ambient and task lighting, control glare, specify CRI 90+, and use LED-compatible dimmers.
Choosing high-quality, well-performing LEDs such as from EmeryAllen helps create offices that feel brighter, calmer, and more focused without needing any additional caffeine.
