Is it a QLED tv? Those are very efficient with the backlight power. QLED only have a blue led backlight and the “quantum dots” in the panel between the backlight and the LCD panel absorb the blue light and emit the red green and blue needed to create the full color spectrum.
How many nits of brightness does it produce? I’d check for the specific model on RTINGS. It won’t help OP much if the TV is efficient, but so dim that it’s unusable in their case.
Reflectivity also helps with brightness when viewed in a bright room. The less reflective (matte) the less brightness the TV needs to overcome distracting light sources reflecting on the screen.
Edit: Had to look it up to be sure, normal LED panels use filters that filter red, green, and blue light from a white light source. This means roughly 1/3 of the light from the backlight is filtered away, hence the energy inefficiency vs QLED which uses the energy from the blue light to create the colors.
Intestingly, some DLP projectors use alternating red, green, and blue light sources which strobe on the DLP chip which takes turns modulating the intensity of each color. Less efficient (and bright) DLPs use a single white light source and a color wheel (rotating color filter).
Just google the specific TV and look at the specs on the company website, it should be listed.
https://www.jackery.com/blogs/knowledge/how-many-watts-does-a-tv-use indicates 50W is probably a bit low, but would depend on your particular model.
I would check two things:
Is it a QLED tv? Those are very efficient with the backlight power. QLED only have a blue led backlight and the “quantum dots” in the panel between the backlight and the LCD panel absorb the blue light and emit the red green and blue needed to create the full color spectrum.
How many nits of brightness does it produce? I’d check for the specific model on RTINGS. It won’t help OP much if the TV is efficient, but so dim that it’s unusable in their case.
Reflectivity also helps with brightness when viewed in a bright room. The less reflective (matte) the less brightness the TV needs to overcome distracting light sources reflecting on the screen.
Edit: Had to look it up to be sure, normal LED panels use filters that filter red, green, and blue light from a white light source. This means roughly 1/3 of the light from the backlight is filtered away, hence the energy inefficiency vs QLED which uses the energy from the blue light to create the colors.
Intestingly, some DLP projectors use alternating red, green, and blue light sources which strobe on the DLP chip which takes turns modulating the intensity of each color. Less efficient (and bright) DLPs use a single white light source and a color wheel (rotating color filter).
It’s also like how cars calculate mileage.
Got brightness down as far as it goes and volume basically muted.
So could it be rated that low? Sure.
But would it actually only use that much? Nope.