”the LG UltraFine 5k monitor which I had bought for my MacBook Pro (2017 USBC) machine was not entering any kind of sleep mode, drawing a ~1.4 Kwh every day”
I don’t think that’s an issue with that monitor model.
”A wide range of equipment – computers, TVs, audio and video equipment, dishwashers, microwave ovens, and electric toys – can have standby and off modes.
Since 2009 these devices are required to switch into a low power mode (such as standby) after a reasonable amount of time
Since 2013, they must not consume more than 0.5 Watts in standby or in off mode”
So, it seems this monitor can’t be sold in the EU.
Curiously, I've had the same problem with 3 different devices of the same model, including using 2 different MacBook Pros. My partner and I have both gotten used to locking our screens when walking away from our desks.
I don’t think that’s an issue with that monitor model.
https://www.cnet.com/products/lg-ultrafine-27md5ka-lcd-monit... says it has sleep and standby modes, and uses 1,2W in them.
So, I would think that unit is broken, or the PC it was connected to didn’t make it sleep.
Also, https://ec.europa.eu/info/energy-climate-change-environment/...:
”A wide range of equipment – computers, TVs, audio and video equipment, dishwashers, microwave ovens, and electric toys – can have standby and off modes.
Since 2009 these devices are required to switch into a low power mode (such as standby) after a reasonable amount of time
Since 2013, they must not consume more than 0.5 Watts in standby or in off mode”
So, it seems this monitor can’t be sold in the EU.