Why aeroplanes dim cabin lights before takeoff and landing
By Paulette Mboga, February 21, 2026Air travel involves many safety precautions, some of which are not immediately obvious to passengers.
One such practice is dimming the cabin lights during takeoff and landing. While it may seem minor, this step plays an important role in passenger safety and comfort. Airlines around the world follow this practice routinely, but few travellers know the reasons behind it.
Enhancing passenger safety
One of the main reasons for dimming lights is safety. Takeoff and landing are the most critical phases of flight, accounting for a significant portion of aviation accidents.
By lowering cabin lighting, airlines help passengers’ eyes adjust to the darker environment outside. In case of an emergency evacuation, such as during a sudden landing or fire, passengers will be able to see outside more clearly and locate emergency exits faster.
Dimming the lights also improves the visibility of emergency lighting systems inside the cabin. Floor-level exit lights and illuminated signs become more noticeable when the main lights are dimmed.
This ensures that in low-light conditions, passengers can safely and quickly evacuate the aircraft if needed. Crew members are trained to guide passengers during these moments, and dimmed lights help reduce confusion and panic.
Reducing discomfort and fatigue
Another reason for dimming lights is to enhance passenger comfort. Bright cabin lights during takeoff and landing can cause glare and discomfort, especially for those sitting near windows. A dimmed cabin reduces eye strain and helps passengers adjust to changing light conditions outside, such as transitioning from day to night or approaching a bright runway.
Moreover, dimmed lighting can create a calmer atmosphere. Takeoff and landing can be stressful for some travellers, and a softer, lower light can help reduce anxiety. Airlines also use dimmed lighting to align passengers’ body clocks with the time at their destination, which is particularly helpful on long-haul flights where jet lag can be an issue.
Dimming cabin lights before takeoff and landing is a small but important part of airline safety and passenger comfort. It prepares passengers for emergencies by helping their eyes adjust and making exit lights more visible.
At the same time, it reduces discomfort, glare, and fatigue, creating a calmer and safer environment inside the plane. Next time you notice the lights dimming, you can appreciate the careful planning that goes into keeping air travel safe and comfortable for everyone on board.