Yawn. My UPerfect QHD+ portable monitor that I bought off Aliexpress consumes less than 5W total. That's 5W total to power the LCD controller all the micro-circuitry and chips, light up the LED backlight, power the electronics that generate an RGB on each pixel.
The Eizo FlexScan FLT monitor has been revealed as a new sustainable model. The company goes so far as to claim that it is the most energy-efficient in the world. Other features include a USB-C power input, with two further USB-C ports, a frameless design and an adjustable arm.