Even though the Eizo EV2456 has 11% more pixels to illuminate than a standard 16:9 display, it's definitely not less power efficient than cheaper competitors with that aspect ratio. At maximum brightness (which, as a reminder, is very bright) we measure just shy of 21W, which translates to a middle spot in the graph. If we set the the backlight of the display to 150 cd/m2 however, the EV2456 shoots up to the top of the graphs. We only measured 11 watts, a remarkably good result. The Iiyama ProLite XUB2492HSU-B1 remains the best here however. In standby and off the EV2456 is nice and power efficient, but not exceptionally so.