It could, probably at the lowest brightness setting. If it was an OLED TV it could use under 10 watts while displaying a black picture. An LCD TV would be measured at the lowest backlight brightness. So YMMV, depending on how dim a picture you’ll settle for.
TV tech has come a long way though. My old 25" CRT TV choked down 240W. The 70" LCD currently on the wall does about 90W. And the 27" TV in my office setup sips 15W.
By your numbers it should be possible, 55" is a little less than 4 times the area of a 27", which you say can run at 15 Watt. 4 times that is 60 Watt, so absolutely within a reasonable enough range.
It could, probably at the lowest brightness setting. If it was an OLED TV it could use under 10 watts while displaying a black picture. An LCD TV would be measured at the lowest backlight brightness. So YMMV, depending on how dim a picture you’ll settle for.
TV tech has come a long way though. My old 25" CRT TV choked down 240W. The 70" LCD currently on the wall does about 90W. And the 27" TV in my office setup sips 15W.
By your numbers it should be possible, 55" is a little less than 4 times the area of a 27", which you say can run at 15 Watt. 4 times that is 60 Watt, so absolutely within a reasonable enough range.