The items in your photos are mainly decorative LED ceiling lights and wall lights. Their uses are:
Round Marble-Design LED Ceiling Light (black rim, marble pattern)
Used as a main room light.
Suitable for bedrooms, living rooms, offices, and hallways.
Adds a modern decorative look.
Round Starry LED Ceiling Light (white with small dots)
General indoor lighting.
Common in bedrooms, sitting rooms, and corridors.
The dotted cover creates a starry effect when switched on.
Blue Crystal LED Ceiling Light
Decorative ceiling lighting.
Ideal for bedrooms, lounges, and children's rooms.
Provides both lighting and interior decoration.