Why building automation disappoints · Part 1 · Magyarul

Smart home lighting and motion sensors: where design goes wrong

At handover, everything works. Motion turns on the lights, the blinds lower at the scheduled time and lighting scenes are a touch away. A few weeks later, the family is back to operating the lights and blinds by hand. The problem often shows up on an ordinary evening, when one person is reading, another is relaxing and someone else just wants to walk through the room.

Imagine your reading light going out because you have barely moved for a few minutes. You wave a hand, and the ceiling lights come on at full brightness. The page is still hard to see, but the light dazzles the person on the sofa. Three design decisions meet in that moment. Where does the light fall, what does the sensor detect, and what does the system do when it detects movement?

Plan the reading light and ambient lighting around the furniture

Start lighting planning with the furniture layout. Position the reading lamp so it lights the page. Give the sofa a separate, softer source of ambient light. Independent lighting circuits let one person read while another relaxes in the same room.

Where should you place motion sensors for lighting?

In the living room, position the sensor to detect someone entering. Test it with the door open so people passing in the hallway do not trigger the living-room lights. In the hallway, light should be available from the first steps. Check the sensor’s coverage with the doors, furniture and actual walking routes in place.

Test from the armchair as well. A walk across the room can make the setup seem fine, while quieter movements during reading may go undetected. Plan the sensor position and the switch-off delay together, and decide which lighting scenes should stay on while someone is sitting still.

Switch between reading and relaxing from a tabletop control

A tabletop control next to the armchair puts the Reading scene within reach. Depending on the setup, it can also adjust the blinds or the music volume. In the video, one touch on the Loxone tabletop control starts the reading scene. The ambient lights fade and become warmer, the Venetian blind lowers, and the bronze reading lamp gradually lights the open book.

The reading light should stay on while you sit quietly. In the Relax scene, someone walking past should not bring the ceiling lights back to full brightness. Agree when automatic control should resume, for example when the resident turns off the scene. See our guide to smart home lighting scenes and wall controls for more examples.

Night lighting for bedrooms and hallways

A bedside control can activate Night mode. In the bedroom, disable automatic lighting from motion while keeping manual control available. In the hallway, movement can still bring on a low-level light for finding your way. Test the route with the bedroom door open. There should be enough light for the first step without light falling directly onto the bed.

What to test at handover

Sit in the armchair and read beyond the programmed switch-off delay. With the Relax scene active, ask someone to walk through the room. Then select Night mode at the bedside and walk to the bathroom. These three checks show whether the controls are within reach, the selected light stays on, and the hallway lights up in time.

For a new build or renovation, plan the lights, sensors and controls together before electrical work starts. Explore Design ONE’s lighting planning service to see how those decisions fit into the wider lighting design.