NOVELTY - The tape has flexible transparent substrate which includes light guide micro-structures on side of incident sunlight. An adhesive layer adheres light guide tape to bus bars of solar panels. Each of light guide micro-structures include in a prism shape with reflective surface for reflecting incident sunlight. The included angle between each of reflective surfaces and flexible transparent substrate is at 30-60 degree to transfer incident sunlight to outside areas of bus bars by single reflecting.    USE - Light guide tape for bus bars of solar panels.    ADVANTAGE - The light guide tapes are applied by adhering to the bus bars of the conventional solar panels, so as to be suitable for several sizes of the conventional solar panels without changing the original design of solar panels in efficient manner.    DETAILED DESCRIPTION - The included angle between reflective surface and flexible transparent substrate is at 40 degree to 50 degree. The light guide micro-structures include metallic reflective coating or light guide prism structures. The height of each of the light guide micro-structures is provided in range of 10-1000 ?m. The height of each of light guide micro-structures is provided in range of 20-100 ?m. The width of each of light guide micro-structures is provided in range of 10-1000 ?m. The width of each of light guide micro-structures is provided in range of 20-100 ?m. The pitch of light guide micro-structures is provided in range of 0-1000 ?m. The pitch of light guide micro-structures is provided in range of 0-100 ?m. The reflective surfaces of light guide micro-structures are facing to same direction or opposite directions. The included angles between reflective surfaces and flexible transparent substrate are same or configured to vary in continuous angles. The material of flexible transparent substrate is selected from group consisting of acrylic resin, polyester and polycarbonate. The adhesive layer is silicone or acrylic adhesive. The protective layer is provided on light guide micro-structures for increasing durability of light guide tape. The material of protective layer is selected from group consisting of ethylene-vinyl acetate and polyolefin.    DESCRIPTION OF DRAWING(S) - The drawings show the perspective views of the light guide tapes.    Light guide tape (11)    Flexible transparent substrate (21)    Adhesive layer (31)    Bus bar (41)    Generating region (51)