Earthlight
Program
00 · ROI calculator
Free
A first number on what your light is costing you.
01 · Lighting assessment
Independent experts measure your building's light.
02 · Comparison report
The alternatives, modeled side by side.
03 · One-week pilot
70% circadian correction, proven in your building.
04 · Lighting purchase
Specify, source, and hold it to the numbers.
The whole program
→
Learn
What is circadian lighting?
Light that follows the body's 24-hour clock, explained.
What is biophilic lighting?
Bringing the qualities of natural light indoors.
Video library
The case for light, in their own words.
All guides
→
Company
Leadership
The people behind Earthlight.
Community
Join the movement for better light.
Contact
Questions, projects, or press — we read everything.
Free Calculator
Your 20-minute Human ROI Review
Find out what value engineering is really costing you.