lcdPower event not working?

Well, and what is "lcdPower" then good for?

I thought, it would describe the backlight intensity - and would normally be off and just switched on from time to time when the watch is turned over.

From the docs of Bangle.setLCDTimeout

With power saving on, the display will turn on if a button is pressed, the watch is turned face up, or the screen is updated (see Bangle.setOptions for configuration). It'll turn off automatically after the given timeout.

I want to get an event when backlight is switched on (in order to show more detailed information) or off, "lock" describes the touchscreen