There was a similar question in this issue
This feature is easy to implement, but is it worth it?

Should be covered by #2783

This feature is easy to implement, but is it worth it?

Yes, it is. I can imagine sitting in a room with dimmable lights, asking for the lights to be set to X% brightness. Of course i mean just that room.

I can imagine sitting in a room with dimmable lights

It should be clarified that this function was added for the English language almost a year ago (in your PR😀) . The problem discussed in this issue is related to the lack of a short version of the phrase.

But as for my opinion, I do not think that the current implementation of this intent works well for everyone.
If you have a large variety of lighting fixtures in the room, then running this command will lead to chaos.
Also short version of phrases may be misidentified if local tiny/small stt models are used.

A solution could be to add to the HA the functionality of dividing the light in the room into main and auxiliary.
Then the phrase "Set lights to 50%" would only affect the main light, and "Set all lights to 50%" would affect all devices in the room. Auxiliary lights are controlled by name.
In this case, false alarms would not be so critical, and the convenience of controlling lighting devices would increase.
Now this problem is solved by creating additional areas or using labels and own intent_script

The same questions apply to the light_HassTurnOn intent.