Harry goes on to admit his wife, Meghan, Duchess of Sussex, has caught on to his habit at their cottage in Kensington Palace.
Harry said, laughing: “Which is insane because – I don’t know whether your wife doesn’t – my wife certainly goes, ‘Well, why turn the lights off? You know, it’s dark.’ I go, ‘We only need one light, we don’t need like six.’
“And all of a sudden it becomes a habit and those small habit changes he’s making, every single person can do,” he continued. “And I think it’s one of the key lessons that he taught us.”