I’m the Red Light Display concierge. First session is usually a 15-minute full-screen session — sit about 6 inches if comfortable (or 30 cm / 18 in), brightness 100%, Night Shift, True Tone, and Invert Colors off. If you need to keep working, use the red filter instead. I will not diagnose or treat anything. When you’re ready, go to /download.
Displays
How good is your screen?
The app reads resolution, color gamut, EDR, and whether hardware brightness can be controlled. Measured optical output stays “Not measured” until a real instrument is used.
Future verified profiles will live here for hardware such as Studio Display, MacBook Pro, iPad Pro OLED, and common external monitors. Until then we will not invent irradiance.
Closest red we ask for on a Display P3 panel: (1, 0, 0), published dominant wavelength about 614.9 nm, inside the 600–700 nm window.