Your Lighting Is Costing You $6,591 Per Employee (And You Don't Even Know It)

The biggest line item in your building isn't construction. It's payroll. And your lighting is quietly taxing it.

A 2019 Harvard thesis analyzed how lighting conditions in office buildings affect worker productivity and built a cost-benefit model around it.

The finding: optimizing lighting and controls in a typical office space could yield productivity improvements worth $6,591 per employee per year.

For a 100-person office, that's over $650,000 annually.

The most practical way to significantly increase productivity? Maximize daylight and supplement strategically with quality electric lighting.

What makes this research compelling is that it wasn't just about light levels. The study evaluated eight lighting features from the WELL Building Standard and found that six of them are likely to pay for themselves through increased productivity alone. Not energy savings. Productivity.

This is the math that most building owners never see. They compare the cost of standard lighting against the cost of better lighting and see a line-item increase. What they don't see is the vastly larger cost of suboptimal human performance happening every day in that space.

Think about it this way: lighting is maybe 1-2% of a building's total cost of ownership. Salaries and benefits are typically 80-90%. A lighting design that improves productivity by even a few percentage points pays for itself many times over.

I don't think most people undervalue lighting because they don't care. They undervalue it because the cost of bad lighting is invisible — it shows up as vague fatigue, more sick days, slower work, and higher turnover. Things that never get traced back to the ceiling.

Good lighting design makes that invisible cost visible — and then eliminates it.