Your lift lobbies already hold an audience. Alumbra proves attention — every play verified, every number reproducible from the event log.
Verified plays, attention seconds, audience mix — standard out-of-home vocabulary, reproducible line by line. Nothing else was ever collected.
DoHSS approval enforced on every creative. No approval reference, no play — the engine will not start.
A per-venue kill-switch turns audience-reactive selection off; the screen falls back to scheduled rotation. Candidly, for your DPO: in this mode the instrument still measures — it stops acting on what it measures.
One lobby, one unit, your creatives. If the numbers don’t earn the wall space, the unit comes off it.