I found that GUI light controls are not precise enough. I mean native ones.
Hue rgb lights offer 16mln colors (defined by API). But colour picker feels like it doesn’t provide whole palete. After moving pointer to particular position, it jumps to side, like to closest color possible… but if there were16M colors - it wouldn’t be needed.
Another case is light brightness control. It makes impossible to set 1%. 2% is the lowest value I achieved. And it was while working on 4k, 42" monitor on which GUI is super big. Therefore it’s not the problem with monitor/mouse resolution.
In that particular case I’ve checked that 1% is accepted by device (sending this value manually to mqtt). So I’m sure it must be something with HA or its GUI