You can paint anywhere you like. You don't need a studio, although it's nice to have one. Painting outdoors is fun and healthy and all you need is an easel or something to rest your canvas or panel on. Panels are more suitable when painting outdoors. Never use a large canvas outdoors as they are too difficult to carry around especially when they are wet. You are after a feeling, colours and a sketch when outdoors and not a finished painting. Finish it at home later.
Always paint in a well ventilated area when using traditional oil paints.
A small room or just enough space to put your work on the wall and stand back about four feet is all you really need.
I use a combination of fluorescent and halogen lighting when painting at night and north light if you are lucky when painting during the day. You don't want shadows and you don't want glare or you can't see what you are doing. Fast forward to 2020 and LED lights work best. Use daylight equal to 100 watts. I use Sylvania.
