<i>”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><p>I don’t think that’s an issue with that monitor model.<p><a href="https://www.cnet.com/products/lg-ultrafine-27md5ka-lcd-monitor-5k-27/" rel="nofollow">https://www.cnet.com/products/lg-ultrafine-27md5ka-lcd-monit...</a> says it has sleep and standby modes, and uses 1,2W in them.<p>So, I would think that unit is broken, or the PC it was connected to didn’t make it sleep.<p>Also, <a href="https://ec.europa.eu/info/energy-climate-change-environment/standards-tools-and-labels/products-labelling-rules-and-requirements/energy-label-and-ecodesign/energy-efficient-products/mode-standby-and-networked-standby_en" rel="nofollow">https://ec.europa.eu/info/energy-climate-change-environment/...</a>:<p><i>”A wide range of equipment – computers, TVs, audio and video equipment, dishwashers, microwave ovens, and electric toys – can have standby and off modes.<p>Since 2009 these devices are required to switch into a low power mode (such as standby) after a reasonable amount of time<p>Since 2013, they must not consume more than 0.5 Watts in standby or in off mode”</i><p>So, it seems this monitor can’t be sold in the EU.