a bidirectional light sheet including at least a first and second array of bare led chips with top and bottom electrodes , where the arrays of leds are sandwiched between at least two transparent substrates having conductors bonded to the electrodes without wires to form the light sheet . the leds of the array are arranged within the light sheets to emit light from opposite surfaces of the light sheet to create a bidirectional light sheet . the bidirectional light sheet is suspended from a ceiling to be non - parallel to the ceiling .