The IO8 Research Journal

01. Total darkness: why a hotel room is almost never dark Oct 08, 2026

02. Silence: below 30 dB at night, what it takes Oct 08, 2026

03. Room temperature: why 18 to 19 °C Oct 08, 2026

04. Air and CO2: 800 ppm, what is measured at night in a closed bedroom Oct 08, 2026

05. Water: filtered in the room, and pool water Oct 08, 2026

07. Evening and morning light: 2,700 K and 1,000 lux Oct 08, 2026

08. Bedding and sleep: what a sleep sensor measures, and what it does not tell you Oct 08, 2026

13. The instrumented room at 1,700 $ a night, and how to make it accessible Oct 08, 2026

15. What is measured in the place itself: air, light, water? Oct 05, 2026

72. How do you handle sleep when you travel? Oct 05, 2026