Blackout Ceiling Tubes

A central HVAC duct and a low mezzanine ceiling had already killed a previous lighting concept. I took the lowest point of that duct as a hard clearance limit and shot a laser level across the room. We hung a flat array of blackout pixel tubes. Standard milky white LED diffusion looks cheap when powered off. I used black diffusion against dark ceiling paint so the rig would visually disappear during the day.

We assembled the five-meter tubes on the floor. A friend helped me lift them onto two six-foot ladders, stringing them up and leveling them a few inches at a time. I originally ran wire inside the casing for power injection at the far end, but it drooped and cast shadows. I ripped the extra wiring out. The strips ran full white from a single end with zero color shift. Black diffusion eats light, but pixel rigs are usually too bright anyway. The physical dimming was exactly what we wanted.

Silent operation meant no fanned power supplies. I split eighteen waterproof units across three circuits. Booting them at once tripped the breakers instantly from inrush current. I wired generic relay PCBs into custom sequencer boxes to stagger the startup by five seconds. The hardware vanishes into the ceiling by afternoon, washes the tables in warm white for dinner, and runs heavy chases when the dance floor opens. The only repair since has been one strip with a single pixel stuck on.