Here is a lesson that I just learned. Having moved into a new house, and found the perfect place for my DP, I bought a lamp to light up the sheet music, and the keyboard. A beautiful lamp, standing slightly behind me and to the side, with a precisely directed beam towards the intended target.
Aaaaand the black keys now cast long shadows, so that everything between them is dark too, and my playing is thrown entirely off. 🤣
I will now hunt for a lamp to hang down from the ceiling right above the centre of the keyboard.