A tube elementary LED, comprising: an elementary glass tube, through which light can be transmitted and has two sealed ends provided with a power plug and a power socket respectively; at least one LED light emitting base plate disposed in the elementary glass tube, which is powered by the power plug and the power socket, the LED light emitting base plate being shaped as a strip; a plurality of LED chips for emitting light mounted on one surface of the LED light emitting base plate, PN junctions of the LED chips being first being connected in series respectively and then connected in parallel by leads, so as to form an anode lead terminal and a cathode lead terminal; characterized in that the LED chips are microcrystalline LED chips, the LED light emitting base plate further has a combination of two phosphors (3 - 5) with broadband emissions; and in that the tube elementary LED comprises a plurality of affixing supports affixing the at least one LED light emitting base plate in an internal chamber of the elementary glass tube, wherein the plurality of affixing supports are made of metal; and a reflector attached on an internal surface or an external surface of the elementary glass tube so as to reflect light emitted from the at least one LED light emitting base plate to outside of the elementary glass tube; wherein the PN junctions of the LED chips have a contact with the reflector at many points through the plurality of affixing supports. an elementary glass tube, through which light can be transmitted and has two sealed ends provided with a power plug and a power socket respectively; at least one LED light emitting base plate disposed in the elementary glass tube, which is powered by the power plug and the power socket, the LED light emitting base plate being shaped as a strip; a plurality of LED chips for emitting light mounted on one surface of the LED light emitting base plate, PN junctions of the LED chips being first being connected in series respectively and then connected in parallel by leads, so as to form an anode lead terminal and a cathode lead terminal; characterized in that the LED chips are microcrystalline LED chips, the LED light emitting base plate further has a combination of two phosphors (3 - 5) with broadband emissions; and in that the tube elementary LED comprises a plurality of affixing supports affixing the at least one LED light emitting base plate in an internal chamber of the elementary glass tube, wherein the plurality of affixing supports are made of metal; and a reflector attached on an internal surface or an external surface of the elementary glass tube so as to reflect light emitted from the at least one LED light emitting base plate to outside of the elementary glass tube; a plurality of affixing supports affixing the at least one LED light emitting base plate in an internal chamber of the elementary glass tube, wherein the plurality of affixing supports are made of metal; and a reflector attached on an internal surface or an external surface of the elementary glass tube so as to reflect light emitted from the at least one LED light emitting base plate to outside of the elementary glass tube; wherein the PN junctions of the LED chips have a contact with the reflector at many points through the plurality of affixing supports.