I wonder if that is an issue. I take off my FR235 during the night but I notice that whatever I do the LEDs are permanently turned on. And even during the day they never go off.
Point is that this drains my battery and forces me to switch my watch off every night (also because the green lights bothers me).
In Garmin connect -->profile I have set Sleep time but that seems have no effect.
The sw version is 8.20
Thanks
Patrick