Alexa App - Bulb or Switch?

[Habib]

Hi,

I've seen, that LM uses Power State, Percent and Brightness for control a dimable light.

1. question:
ist the usage of all three skills usefull? I mean brightness and percent?

2. question:
What is the difference between percent and brightness?

3. question:
How I can do, that my lights are known in alexa as bulb or light (in german lampe). Alexa shows my DALI-Lights all as switch (Deckenlicht Fitnessraum)...
See the screenshot:
   

Thx forwards

Regards
Habib