For most normal electronic equipment and devices, a prominent panel light is provided as a power indicator. Not so with the Roku Ultra's front white indicating LED for which no operational description is provided by Roku. After experimentation, it appears that the Ultra's front panel light is only on when either a Roku app is streaming or the Screensaver Start Time timer is timing. This timer starts and runs when the home button has been pressed as long as none of the Home screen menu navigation or selection buttons are operated which resets it to start timing again from zero. Once the timer times out, the screen saver display comes on and the Roku front panel light goes off. If a Home Screen option is displayed (no app streaming) and the Roku (or TV) power button is used to turn off the TV before the timer times out, the TV shuts off and the Roku front panel light stays on until after the Screensaver start timer times out. However, I have also seen the light turn off after only a brief 5 to 8 sec. delay. This behavior is entirely unpredictable and I’ve not been able to consistently reproduce it. Since having this light stay on (e.g. at night) can be annoying, the easiest solution is to simply set the screen saver start time to one minute and accept the 60 second or so delay before the indicating light goes off. It's irrelevant whether or not the screen saver is prematurely active at other times since one can simply press the Home button to return to normal use.