Is the T4 energy efficient?

The T4 is designed to save energy. It typically uses less than 6W when on, only 0.9W when asleep with Wi-Fi, and just 0.3W with Ethernet.

It also has a feature called Auto Standby. If you don’t press any buttons on the remote for 3 hours, it will automatically go into standby mode. You can adjust or turn off this feature by going to: Settings > System > Standby Options.