Method for adapting LED lamp tube to fluorescent lamp tube holder, LED lamp tube holder and illumination device

Abstract

A method for adapting an LED lamp tube to a fluorescent lamp tube holder, an LED lamp tube holder and an illumination device. The LED lamp tube holder comprises an adaptation bracket and a lamp tube holding clip which is connected to the adaptation bracket. The lamp tube holding clip has a circular-arc cylindrical holding surface, thereby being clamped to the outer wall of a light transmission tube of the LED lamp tube. A cylindrical pin which axially extends from the LED lamp tube holder along the light transmission tube is arranged on the adaptation bracket. The shape of the pin is the same as that of an electrically-conductive pin of the fluorescent lamp tube, thereby enabling the LED lamp tube holder to be arranged in the fluorescent lamp tube holder. The LED lamp tube can be arranged on the basis of the original LED lamp tube holder.

Claims

1. A LED lamp tube holder for adapting a LED lamp tube to a fluorescent lamp tube holder, wherein said fluorescent lamp tube holder is suitable for installing a fluorescent lamp tube and provides a power interface for said fluorescent lamp tube; said fluorescent lamp tube includes a straight lamp tube body and two interface covers arranged at both ends of said lamp tube body respectively, wherein at least one interface cover is provided with two cylindrical conductive pins which axially extend from such interface cover along said lamp tube body; said LED lamp tube includes a light transmission tube with a built-in LED lamp body; said LED lamp tube holder comprises an adaptation bracket and a lamp tube holding clip which is connected to the adaptation bracket, wherein said lamp tube holding clip has a circular-arc cylindrical holding surface, thereby enabling being clamped to the outer wall of a light transmission tube of said LED lamp tube; a cylindrical pin which axially extends from the LED lamp tube holder along said light transmission tube is arranged on said adaptation bracket wherein the shape of said cylindrical pin is the same as that of an electrically-conductive pin of said fluorescent lamp tube, thereby enabling the LED lamp tube holder to be arranged in the fluorescent lamp tube holder; the LED lamp tube holder further comprises an extension connecting base with a circular-arc cylindrical inner surface, wherein said extension connecting base is formed by axially extending a bottom of a lamp tube holding clip along the holding surface of such lamp tube holding clip, the end of said extension connecting base connected to said adaptation bracket; wherein a cross section of the holding surface of said lamp tube holding clip presents a circular arc shape, and a central angle between radius lines which pass through two endpoints of such circular arc is less than 170 degree.

2. The LED lamp tube holder for adapting a LED lamp tube to a fluorescent lamp tube holder according to claim 1, wherein: the holding surface of said lamp tube holding clip and the inner surface of said extension connecting base have a circular-arc cross section, and the central angle of the cross section of said holding surface is greater than a central angle of said inner surface; wherein the central angle of said cross section refers to an included angle between radius lines which pass through two endpoints of such circular arc.

3. The LED lamp tube holder for adapting a LED lamp tube to a fluorescent lamp tube holder according to claim 2, wherein: said adaptation bracket assumes a flat plate shape and a bottom surface of said adaptation bracket presents a circular-arc cylindrical surface shape so that the bottom surface of said adaptation bracket is connected to the inner surface at the end of said extension connecting base, thereby forming two grooves among said adaptation bracket, said extension connecting base and said lamp tube holding clip.

4. The LED lamp tube holder for adapting a LED lamp tube to a fluorescent lamp tube holder according to claim 2, wherein: the LED lamp tube holder further comprises a triangular prism-shaped reinforcing rib, a cross section of which presents a right triangle shape; wherein two mutually perpendicular sides of said reinforcing rib are connected to the internal plate surface of said adaptation bracket and the inner surface of said extension connecting base.

5. A LED illumination device adapted to a fluorescent lamp tube holder, comprising a LED lamp tube, wherein said LED lamp tube includes a light transmission tube with a built-in LED lamp body; said fluorescent lamp tube holder is suitable for installing a fluorescent lamp tube and provides a power interface for said fluorescent lamp tube; said fluorescent lamp tube comprises a straight lamp tube body and two interface covers arranged at both ends of said lamp tube body respectively; at least one interface cover is provided with two cylindrical conductive pins which axially extend from such interface cover along said lamp tube body; the LED illumination device further comprises a LED lamp tube holder, which comprises an adaptation bracket and a lamp tube holding clip which is connected to the adaptation bracket; said lamp tube holding clip has a circular-arc cylindrical holding surface, thereby enabling being clamped to the outer wall of a light transmission tube of said LED lamp tube; a cylindrical pin which axially extends from the LED lamp tube holder along said light transmission tube is arranged on said adaptation bracket, wherein the shape of said cylindrical pin is the same as that of an electrically-conductive pin of said fluorescent lamp tube, thereby enabling the LED lamp tube holder to be arranged in the fluorescent lamp tube holder; said LED lamp tube holder further comprises an extension connecting base with a circular-arc cylindrical inner surface, wherein said extension connecting base is formed by axially extending a bottom of a lamp tube holding clip along the holding surface of such lamp tube holding clip, the end of said extension connecting base connected to said adaptation bracket, wherein a cross section of the holding surface of said lamp tube holding clip presents a circular arc shape, and a central angle between radius lines which pass through two endpoints of such circular arc is less than 170 degree.

6. The LED illumination device adapted to a fluorescent lamp tube holder according to claim 5, wherein: the holding surface of said lamp tube holding clip and the inner surface of said extension connecting base have a circular-arc cross section, and the central angle of the cross section of said holding surface is greater than a central angle of said inner surface; wherein the central angle of said cross section refers to an included angle between radius lines which pass through two endpoints of such circular arc.

7. The LED illumination device adapted to a fluorescent lamp tube holder according to claim 6, wherein: said adaptation bracket assumes a flat plate shape and a bottom surface of said adaptation bracket presents a circular-arc cylindrical surface shape so that the bottom surface of said adaptation bracket is connected to the inner surface at the end of said extension connecting base, thereby forming two grooves among said adaptation bracket, said extension connecting base and said lamp tube holding clip.

8. The LED illumination device adapted to a fluorescent lamp tube holder according to claim 7, wherein: said LED lamp tube holder further comprises a triangular prism-shaped reinforcing rib, a cross section of which presents a right triangle shape; wherein two mutually perpendicular sides of said reinforcing rib are connected to the internal plate surface of said adaptation bracket and the inner surface of said extension connecting base.

Description

DESCRIPTION OF FIGURES

(1) FIG. 1 is a schematic diagram for axonometric projection of said LED lamp tube holder 1 in a preferred embodiment of the present invention;

(2) FIG. 2 is an another schematic diagram for axonometric projection of said LED lamp tube holder 1 in a preferred embodiment of the present invention;

(3) FIG. 3 is a left view for the LED lamp tube holder 1 in said preferred embodiment, where one side of said adaptation bracket 11 faces a viewer;

(4) FIG. 4 is a schematic diagram for axonometric projection of said fluorescent lamp tube holder 9 in said preferred embodiment;

(5) FIG. 5 is an another schematic diagram for axonometric projection of said fluorescent lamp tube holder 9 in said preferred embodiment;

(6) FIG. 6 is a front view for orthographic projection of the LED illumination device in said preferred embodiment;

(7) FIG. 7 is a schematic diagram for axonometric projection of said preferred embodiment in a decomposition state;

(8) FIG. 8 is an assembly diagram in Assembly Mode 1 of said preferred embodiment;

(9) FIG. 9 is the first assembly diagram in Assembly Mode 2 of said preferred embodiment;

(10) FIG. 10 is the second assembly diagram in Assembly Mode 2 of said preferred embodiment;

(11) FIG. 11 is the third assembly diagram in Assembly Mode 2 of said preferred embodiment;

(12) FIG. 12 is the fourth assembly diagram in Assembly Mode 2 of said preferred embodiment;

(13) FIG. 13 is the fifth assembly diagram in Assembly Mode 2 of said preferred embodiment;

(14) FIG. 14 is the sixth assembly diagram in Assembly Mode 2 of said preferred embodiment;

(15) FIG. 15 is the seventh assembly diagram in Assembly Mode 2 of said preferred embodiment;

(16) FIG. 16 is a schematic diagram for axonometric projection of a fluorescent illumination lamp including a fluorescent lamp tube 8, a fluorescent lamp holder 9 and a lamp shade 7 in the prior art.

MODE OF CARRYING OUT THE INVENTION MODEL

(17) To further illustrate the principle and structure of the invention, the invention is further described in detail in accordance with the preferable embodiments shown in the figures.

(18) The present invention discloses a method for adapting a LED lamp tube 2 to a fluorescent lamp tube holder 9. Said fluorescent lamp tube holder 9 is suitable for installing a fluorescent lamp tube 8 and provides a power interface for said fluorescent lamp tube 8. The fluorescent lamp tube 8 includes a straight lamp tube body 81 and two interface covers 82 arranged at both ends of said lamp tube body 81 respectively. At least one interface cover 82 is provided with two cylindrical conductive pins 83 which axially extend from such interface cover (82) along said lamp tube body 81. Said LED lamp tube 2 includes a light transmission tube 21 with a built-in LED lamp body. Said method consists of the following steps:

(19) A. As shown in FIGS. 1 to 3 and FIG. 7, at least one LED lamp tube holder 1 including an adaptation bracket 11 and a lamp tube holding clip 12 is used; said lamp tube holding clip 12 is used to clamp the outer wall of a light transmission tube 21 of said LED lamp tube 2, and said adaptation bracket 11 is provided with a cylindrical pin 13 which axially extends from said LED lamp tube holder 1 along said light transmission tube 21; the shape of said pin 13 is the same as that of an electrically-conductive pin 83 of said fluorescent lamp tube 8 as shown in FIG. 16.

(20) B. As shown in FIG. 7, said LED lamp tube is installed on the fluorescent lamp tube holder through said LED lamp tube holder described in Step A.

(21) This invention does not need to dismantle components of an original fluorescent lamp holder, a lamp shade and the like; the LED lamp tube can be arranged on the basis of the original LED lamp tube holder; compared with the prior art where a tubular LED illumination lamp is used to replace a fluorescent illumination lamp, the operation in the present invention is simple and quick. Also, in addition to the replacement of fluorescent lamp tube, this invention does not need to discard or recycle other accessories for fluorescent lamp tube; compared with the prior art where a tubular LED illumination lamp is used to replace a fluorescent illumination lamp, the replacement cost in the present invention is reduced, enabling the replacement to comply with the energy saving and environmental protection requirements.

(22) In order to implement the above method, the present invention also discloses a LED lamp tube holder 1 for adapting a LED lamp tube to a fluorescent lamp tube holder. As shown in FIGS. 1 to 5, said fluorescent lamp tube holder 9 is suitable for installing a fluorescent lamp tube 8 and provides a power interface for said fluorescent lamp tube 8. The fluorescent lamp tube 8 includes a straight lamp tube body 81 and two interface covers 82 arranged at both ends of said lamp tube body 81 respectively. At least one interface cover 82 is provided with two cylindrical conductive pins 83 which axially extend from such interface cover 82 along said lamp tube body 81. Said LED lamp tube 2 includes a light transmission tube 21 with a built-in LED lamp body. Said LED lamp tube holder 1 comprises an adaptation bracket 11 and a lamp tube holding clip 12 which is connected to the adaptation bracket 11. Said lamp tube holding clip 12 has a circular-arc cylindrical holding surface 121, thereby enabling being clamped to the outer wall of a light transmission tube 21 of said LED lamp tube 2. A cylindrical pin 13 which axially extends from the LED lamp tube holder 1 along said light transmission tube 21 is arranged on said adaptation bracket 11; the shape of said pin 13 is the same as that of an electrically-conductive pin 83 of said fluorescent lamp tube 8, thereby enabling the LED lamp tube holder 1 to be arranged in the fluorescent lamp tube holder 9.

(23) To ensure that said lamp tube holding clip 2 firmly clamps a light transmission tube 21 of said LED lamp tube 2, in a preferred embodiment of the present invention, as shown in FIG. 3, the cross section of the holding surface 121 of said lamp tube holding clip 12 presents a circular arc shape, and the central angle between radius lines which pass through two endpoints of such circular arc is less than 170 degree.

(24) In a preferred embodiment of the present invention, as shown in FIG. 1 and FIG. 2, the concrete structure for implementing the connection of said adaptation bracket 11 with said lamp tube holding clip 12 is that said LED lamp tube holder 1 also includes an extension connecting base 14 with a circular-arc cylindrical inner surface 141. Said extension connecting base 14 is formed by axially extending the bottom of a lamp tube holding clip 12 along the holding surface 121 of such lamp tube holding clip 12. The end of said extension connecting base 14 is connected to said adaptation bracket 11. This structure ensures solid connection of an adaptation bracket 11 with a lamp tube holding clip 12, enabling a LED lamp tube holder 1 to be rotated in a fluorescent lamp tube holder 9.

(25) In order for a lamp tube holding clip 12 to securely connect an adaptation bracket 11 through an extension connecting base 14 as well as to clamp a light transmission tube 21 through elastic deformation when a LED lamp tube 2 is installed, in a preferred embodiment of the present invention, as shown in FIGS. 1 and 2, the holding surface 121 of said lamp tube holding clip 12 and the inner surface 141 of said extension connecting base 14 have a circular-arc cross section, and the central angle of the cross section of said holding surface 121 is greater than that of said inner surface. The central angle of said cross section refers to an included angle between radius lines which pass through two endpoints of such circular arc. That is, an extension connecting base 14 is not connected to a whole of a lamp tube holding clip 12 but connected to a part of a lamp tube holding clip 12, ensuring that a lamp tube holding clip 12 has a certain elasticity to adapt a LED lamp tube 2 to a LED lamp tube holder 1.

(26) In order for the power line of a LED lamp tube 1 to be easily laid, in a preferred embodiment of the present invention, as shown in FIGS. 1, 2 and 6, said adaptation bracket 11 assumes a flat plate shape and the bottom surface of said adaptation bracket 11 presents a circular-arc cylindrical surface shape so that the bottom surface of said adaptation bracket 11 is connected to the inner surface 141 at the end of said extension connecting base 14, thereby forming two grooves 15 among said adaptation bracket, said extension connecting base 14 and said lamp tube holding clip 12. When a LED lamp tube 2 is installed in said LED lamp tube holder 1, the power line of said LED lamp tube 2 can go out of said LED lamp tube holder 1 through a groove 15 to prevent the rigid bending of the power line of said LED lamp tube 2 from the damage of said LED lamp tube 2.

(27) To enhance the mechanical strength, in a preferred embodiment of the present invention, as shown in FIGS. 1 and 2, said LED lamp tube holder 1 also includes a triangular prism-shaped reinforcing rib 16, the cross section of which presents a right triangle shape. Two mutually perpendicular sides of said reinforcing rib 16 are connected to the internal plate surface of said adaptation bracket 11 and the inner surface 141 of said extension connecting base 14.

(28) In a preferred embodiment of the present invention, said fluorescent lamp tube holder 9 has the following concrete structure: as shown in FIGS. 4 and 5, said fluorescent lamp tube holder 9 comprises a bracket 91 with a recess 911 and a cylindrical pin connecting turntable 92 which is rotatably installed in said recess 911. Said recess 91 has a cylindrical surface internal wall. Said bracket 91 is processed with a pin leading-in groove 913 which forms a vertical wall 912 of said recess 911, and said pin connecting turntable 92 is also processed with a pin slot 921 which runs through said pin connecting turntable 92. The above concrete structure of said fluorescent lamp tube holder enables said fluorescent lamp tube 2 installed on said fluorescent lamp tube holder 9 to be more reliable and durable.

(29) Moreover, the present invention provides an illumination device adapted to a fluorescent lamp tube holder on the basis of said LED lamp tube holder 1, as shown in FIGS. 1 to 6, including a LED lamp tube 2. Said LED lamp tube 2 includes a light transmission tube 21 with a built-in LED lamp body. Said fluorescent lamp tube holder 9 is suitable for installing a fluorescent lamp tube 8 and provides a power interface for said fluorescent lamp tube 8. The fluorescent lamp tube 8 includes a straight lamp tube body 81 and two interface covers 82 arranged at both ends of said lamp tube body 81 respectively. At least one interface cover 82 is provided with two cylindrical conductive pins 83 which axially extend from such interface cover 82 along said lamp tube body 81. Especially, said LED illumination device also includes a LED lamp tube holder 1. Said LED lamp tube holder 1 comprises an adaptation bracket 11 and a lamp tube holding clip 12 which is connected to the adaptation bracket 11. Said lamp tube holding clip 12 has a circular-arc cylindrical holding surface 121, thereby enabling being clamped to the outer wall of a light transmission tube 21 of said LED lamp tube 2. A cylindrical pin 13 which axially extends from the LED lamp tube holder 1 along said light transmission tube 21 is arranged on said adaptation bracket 11; the shape of said pin 13 is the same as that of an electrically-conductive pin 83 of said fluorescent lamp tube 8, thereby enabling the LED lamp tube holder 1 to be arranged in the fluorescent lamp tube holder 9.

(30) For a LED lamp tube 2, in a preferred embodiment of the present invention, as shown in FIG. 7, said LED lamp tube 2 also includes a cover 22 used to seal both ends of said light transmission tube 21 respectively, and the power line of said LED lamp body goes out of a cover 22.

(31) In a preferred embodiment of the present invention, said LED lamp body adopts a composite LED lamp body including a base plate and at least a light-emitting unit electrically connected to such base plate, that is, multiple LED illuminants are used to combine into an integral whole according to a certain configuration method.

(32) Said LED light-emitting unit includes at least a LED illuminant. When said LED light-emitting unit has only a LED illuminant, the LED illuminant is required to be electrically connected to a base plate by welding or surface mounting. When said LED light-emitting unit has more than two LED illuminants, these LED illuminants are electrically connected to a circuit board through integration, that is, they are integrated in order to achieve a better illumination effect.

(33) As stated above, to ensure that said lamp tube holding clip 2 firmly clamps a light transmission tube 21 of said LED lamp tube 2, in a preferred embodiment of the present invention, as shown in FIG. 3, the cross section of the holding surface 121 of said lamp tube holding clip 12 presents a circular arc shape, and the central angle between radius lines which pass through two endpoints of such circular arc is less than 170 degree.

(34) In a preferred embodiment of the present invention, as shown in FIG. 1 and FIG. 2, the concrete structure for implementing the connection of said adaptation bracket 11 with said lamp tube holding clip 12 is that said LED lamp tube holder 1 also includes an extension connecting base 14 with a circular-arc cylindrical inner surface 141. Said extension connecting base 14 is formed by axially extending the bottom of a lamp tube holding clip 12 along the holding surface 121 of such lamp tube holding clip 12. The end of said extension connecting base 14 is connected to said adaptation bracket 11.

(35) In order for a lamp tube holding clip 12 to securely connect an adaptation bracket 11 through an extension connecting base 14 as well as to clamp a light transmission tube 21 through elastic deformation when a LED lamp tube 2 is installed, in a preferred embodiment of the present invention, as shown in FIGS. 1 and 2, the holding surface 121 of said lamp tube holding clip 12 and the inner surface 141 of said extension connecting base 14 have a circular-arc cross section, and the central angle of the cross section of said holding surface 121 is greater than that of said inner surface. The central angle of said cross section refers to the included angle between radius lines which pass through two endpoints of such circular arc.

(36) In order for the power line of a LED lamp tube 1 to be easily laid, in a preferred embodiment of the present invention, as shown in FIGS. 1, 2 and 6, said adaptation bracket 11 assumes a flat plate shape and the bottom surface of said adaptation bracket 11 presents a circular-arc cylindrical surface shape so that the bottom surface of said adaptation bracket 11 is connected to the inner surface at the end of said extension connecting base 14, thereby forming two grooves 15 among said adaptation bracket, said extension connecting base 14 and said lamp tube holding clip 12.

(37) To enhance the mechanical strength, in a preferred embodiment of the present invention, as shown in FIGS. 1 and 2, said LED lamp tube holder 1 also includes a triangular prism-shaped reinforcing rib 16, the cross section of which presents a right triangle shape. Two mutually perpendicular sides of said reinforcing rib 16 are connected to the internal plate surface of said adaptation bracket 11 and the inner surface 141 of said extension connecting base 14.

(38) In a preferred embodiment of the present invention, said fluorescent lamp tube holder 9 has the following concrete structure: as shown in FIGS. 4 and 5, said fluorescent lamp tube holder 9 comprises a bracket 91 with a recess 911 and a cylindrical pin connecting turntable 92 which is rotatably installed in said recess 911. Said recess 91 has a cylindrical surface internal wall. Said bracket 91 is processed with a pin leading-in groove 913 which forms a vertical wall 912 of said recess 911, and said pin connecting turntable 92 is also processed with a pin slot 921 which runs through said pin connecting turntable 92.

(39) Based on the above-mentioned LED lamp tube holder 1 and LED illumination device, in order to implement the above method in Steps AB, two specific assembly modes can be used to install a LED lamp tube 2 on a fluorescent lamp tube holder 9.

(40) In Assembly Mode 1 in a preferred embodiment of the present invention, Step B includes the following sub-steps:

(41) B11. As shown in FIG. 8, in the direction of arrow, at least one end of a light transmission tube 21 of said LED lamp tube 2 is embedded or clamped in a lamp tube holding clip 12 of said LED lamp tube holder 1, ensuring that said lamp tube holding clip 12 firmly clamps said light transmission tube 21.

(42) B12. Said LED lamp tube 2 which clamps the LED lamp tube holder 1 is installed in said fluorescent lamp tube holder 1 through the pin 13 of an adaptation bracket 11 of said LED lamp tube holder 1.

(43) As stated above, in a preferred embodiment of the present invention, as shown in FIGS. 4 and 5, said fluorescent lamp tube holder 9 comprises a bracket 91 with a recess 911 and a cylindrical pin connecting turntable 92 which is rotatably installed in said recess 911. Said recess 911 has a cylindrical surface internal wall. Said bracket 91 is processed with a pin leading-in groove 913 which forms a vertical wall 912 of said recess 911, and said pin connecting turntable 92 is also processed with a pin slot 921 which runs through said pin connecting turntable 92. For said fluorescent lamp tube holder 9, Step B12 has the following sub-steps:

(44) B121. Said pin connecting turntable 92 is rotated to enable its pin slot 921 and said pin leading-in groove 913 on the bracket 91 to interpenetrate.

(45) B122. The pin 13 of an adaptation bracket 11 of said LED lamp tube holder 1 is pressed from the pin leading-in groove of a bracket 91 of said fluorescent lamp holder 9 into a pin slot 921 of said pin connecting turntable 92.

(46) B123. The LED lamp tube 2 which clamps said LED lamp tube holder 1 is rotated to make the pin leading-in groove 913 of a bracket 91 of said fluorescent lamp holder 9 and the pin slot 921 of said pin connecting turntable 92 unable to interpenetrate so that said LED lamp tube 2 is installed in said fluorescent lamp tube holder 9.

(47) In Assembly Mode 2 in a preferred embodiment of the present invention, Step B also includes the following sub-steps:

(48) B21. Said LED lamp tube holder 1 is installed in said fluorescent lamp tube holder 9 through the pin 13 of an adaptation bracket 11 of said LED lamp tube holder 1.

(49) In a preferred embodiment of the present invention, said fluorescent lamp tube holder 9 comprises a bracket 91 with a recess 911 and a cylindrical pin connecting turntable 92 which is rotatably installed in said recess 911. Said recess 911 has a cylindrical surface internal wall. Said bracket 91 is processed with a pin leading-in groove 913 which forms a vertical wall 912 of said recess 911, and said pin connecting turntable 92 is also processed with a pin slot 921 which runs through said pin connecting turntable 92. In this case, Step B21 includes the following sub-steps:

(50) B211. Said pin connecting turntable 92 is rotated to enable its pin slot 921 and said pin leading-in groove 921 on the bracket 91 to interpenetrate.

(51) B212. As shown in FIG. 9, in the direction of arrow, the pin 13 of an adaptation bracket 11 of said LED lamp tube holder 1 is pressed from the pin leading-in groove of a bracket 91 of said fluorescent lamp holder 9 into a pin slot 921 of said pin connecting turntable 92, as shown in FIG. 10.

(52) B213. As indicated by the arrow in FIG. 10, a LED lamp tube holder 1 is rotated to make the pin leading-in groove 913 of a bracket 91 of said fluorescent lamp holder 9 and the pin slot 921 of said pin connecting turntable 92 unable to interpenetrate as shown in FIG. 11 so that a LED lamp tube holder 1 is installed in said fluorescent lamp tube holder 9; in a preferred embodiment of the present invention, as shown in FIG. 12, two LED lamp tube holders 1 are installed in two fluorescent lamp tube holders 9 arranged in a lamp shade 7.

(53) After Steps B211 to B213, the following sub-steps are performed:

(54) B22. In a preferred embodiment of the present invention, as indicated by the arrow in FIG. 13, both ends of a light transmission tube 21 of a LED lamp tube 2 are clamped in the lamp tube holding clip 12 of said LED lamp tube holder 1 in Step B21, as shown in FIG. 14; by rotating said LED lamp tube 2, the lamp tube holding clips 12 of two LED lamp tube holders 1 are rotated in the direction of the clip opening which faces a lamp shade 7, thereby ensuring that said lamp tube holding clip 12 firmly clamps said light transmission tube 21 and said LED lamp tube 2 are not enabled to fall away from said LED lamp tube holder 1. In a preferred embodiment of the present invention, a LED lamp tube 2 is installed between both fluorescent lamp tube holders 9. When said LED lamp tube 2 is installed in a fluorescent lamp tube holder 9, it is only necessary to install one end of said LED lamp tube 2 in a LED lamp tube holder 1. In this case, a LED lamp tube 2 can be clamped in a lamp tube holding clip 12, whereas for a lamp tube holding clip 12 made of elastic material, a LED lamp tube 2 can also be pressed into a lamp tube holding clip 12. Consequently, a light transmission tube 21 of a LED lamp tube 2 can be either embedded or clamped in a lamp tube holding clip 12 of a LED lamp tube holder 1; and a LED lamp tube 2 can be installed either between both fluorescent lamp tube holders 9 or on a fluorescent lamp tube holder 9.