Sleep is the one wellness promise every traveller believes in, because everyone has had the bad night and paid for it the next day. Hospitality has noticed. Sleep programmes, sleep concierges, pillow menus, mattress partnerships, wearable tie-ins: the sleep economy is now a fixture of the upper end of the market.
Here is what sits underneath the promise, in the published record.
The two things that decide a night are the two things nobody publishes
Of 146 wellness and eco properties we scored, 73 publish nothing about light. Not colour temperature, not flicker, not blackout provision, nothing. Sound is emptier still: it is the newest pathway in our standard precisely because almost no property anywhere publishes an acoustic fact about its rooms, and the handful that score at all score on our own site assessments rather than on anything they have released.
A hotel that sells sleep and publishes neither its lighting nor its sound environment is selling the outcome while withholding the inputs.
What the existing standards ask for
The building certifications that address sleep at all address it obliquely. WELL v2 carries real lighting requirements, circadian design among them, but it certifies office towers far more often than hotels: the certifier's own directory lists 23 hospitality projects with full certification, worldwide, ever. The green hotel labels ask about bulbs as an energy question. The Standard of Building Biology Testing Methods is the exception, specifying how to measure a sleeping area properly, and it is a method, not a hotel certification.
So a traveller who cares about sleep has almost nothing to read. The fix is not complicated. Warm light after dark, blackout at every bed, daylight in the room, no mechanical plant audible from the pillow: every one of those is checkable in an afternoon and publishable in a paragraph. The properties that have done it hold some of the strongest rows in this index, and the pathway pages list every one.