 The combined effect is that designers can make some objects appear as bright as if the room were fully lighted, while making other objects appear as dark as if the room were completely dark.The "black box trick" of using performers dressed in black in a dark playing space has been in use for millennia, starting with the jugglers performing for the emperor in ancient China.Japan developed this technique in its Bunraku Theatre by having puppeteers wear black in order to place complete emphasis on the puppet.