As a general approximation, brightness should be set so that 4% above black is just visible (that is a solid bar RGB 10,10,10 can just be seen on a RGB 0,0,0 background).
As a general approximation, brightness should be set so that 4% above black is just visible (that is a solid bar RGB 10,10,10 can just be seen on a RGB 0,0,0 background).