Soon there may be non-stop 19 hour flights from New York to Sydney, Australia:
On long-haul flights, cabin lights are typically dimmed about two hours after take-off and turned back up about two hours before landing, said Sveta Postnova, a senior lecturer in neurophysics and brain dynamics at the University of Sydney. Depending on the destination, that practice can make jet lag worse, she noted.
One of the test [19 hour] flights from New York will follow the normal pattern. But on the other flight, lights will stay on for about six or seven hours after departure. Researchers will compare passenger data from the two flights to determine whether the lighting change affected jet lag. Meal service will be aligned with the lighting, Ms. Postnova said.
Light plays a key role in regulating sleep, but “recently we are learning that meals, exercise and other environmental factors also affect our body clock,” Ms. Postnova said. A big unknown for air travel is how to schedule lighting, meals and exercise to minimize jet lag.
Here is the WSJ article. My preference is for them to keep the lights on, and the windows open, for much longer than is currently the case. Eyemasks are cheap and underused.
Also, it may be my imagination, but anecdotally I observe that screen viewing has (additionally) replaced reading to an extraordinary extent even in just the last five years. True?