Does it shorten the lifespan of monitors?

[goberwei]

I noticed that I have to first set the brightness of my monitor to 100% manually and then open up the app to allow its full brightness range to be adjustable.
So my question is, does it truly control the brightness of my external monitors hardware-wise? or it's just software-wise? Cause it seems like my actual monitor settings would maintain output 100% of brightness which makes me wonder if that will shorten my monitors' lifespan.

Thanks!