Overhead lighting beam for a sesamless dark room

[Raymond Hani Artin]

Hello,

I am looking to shoot myself playing the piano at home, however, the look i want is a dark seamless room with an overhead light ( Beam preferred ) with minimal budget. How many lights and what types of lights can I use for that look , knowing that I can manage to bring a black chroma key (3x5) behind to make a dark look from behind and maybe some wooden vinyls on the ground.

Room dimensions:

-12 m long

-3.5 m wide 

-2.5 m - 3 m Height