Dell UltraSharp 27 User Manual page 18

As defined in EU 2019/2021 and EU 2019/2013 (U2723QE/U3223QE only).
1
Max brightness and contrast setting with maximum power loading on all USB ports.
2
P : Power consumption of On Mode as defined in Energy Star 8.0 version.
3
on
TEC: Total energy consumption in kWh as defined in Energy star 8.0 version.
This document is informational only and reflects laboratory performance.
Your product may perform differently, depending on the software, components and
peripherals you ordered and shall have no obligation to update such information.
Accordingly, the customer should not rely upon this information in making decisions
about electrical tolerances or otherwise. No warranty as to accuracy or completeness
is expressed or implied.
NOTE: This monitor is ENERGY STAR certified.
This product qualifies for ENERGY STAR in the factory default settings which can be
restored by "Factory Reset" function in the OSD menu. Changing the factory default
settings or enabling other features may increase power consumption that could exceed
the ENERGY STAR specified limit.
18 | About Your Monitor