During a long flight especially, there are times when cabin crew might ask passengers to close their window shades. Apart from take-off and landing, when window shades must be open, the passenger sitting in the window seat decides whether or not they want their window shade open. During a long flight especially, there are times when cabin crew might ask passengers to close their window shades. An open window shade is unlikely to bother anyone except when all other shades are closed. Once the aircraft crosses from night into day, even a single open window shade floods the cabin with light.

Source: Stuff November 08, 2018 20:48 UTC