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An illumination device includes a light tube holder including two connectors for receiving either a light-emitting diode (LED) tube or a fluorescent tube. The connector includes three conductive elastic pieces therein. One elastic piece is electrically connected to an LED tube drive circuit board an

An illumination device includes a light tube holder including two connectors for receiving either a light-emitting diode (LED) tube or a fluorescent tube. The connector includes three conductive elastic pieces therein. One elastic piece is electrically connected to an LED tube drive circuit board and a fluorescent tube, and the other two elastic pieces are respectively electrically connected to the LED and fluorescent tube drive circuit boards. A normally closed switch is located in the one of the connectors. The switch has a first end connected between a power supply and a first end of a ballast, and a second end connected to a second end of the ballast. When the LED tube is mounted to the holder, the switch is closed, and when the fluorescent tube is mounted to the holder the switch is open.

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1. An illumination device comprising: a light tube holder comprising: a base;a drive circuit board mounted in the base and comprising a power supply, a ballast having one end connected to a positive terminal of the power supply, a light-emitting diode (LED) tube drive circuit board, and a fluorescen

1. An illumination device comprising: a light tube holder comprising: a base;a drive circuit board mounted in the base and comprising a power supply, a ballast having one end connected to a positive terminal of the power supply, a light-emitting diode (LED) tube drive circuit board, and a fluorescent tube drive circuit board mounted in the base;first and second connectors at opposite ends of the base for selectively receiving one of a fluorescent tube and an LED tube, the fluorescent tube comprising two conductive pins arranged on one end thereof and another two conductive pins arranged on an opposite end thereof, the LED tube comprising a conductive pin and an insulating pin at each of two opposite ends thereof;wherein each of the first and second connectors comprises: a retainer defining a though hole;a rotary member rotatably received in the through hole, and defining a first groove to receive the two pins at on one end of one of the tubes;first, second and third elastic pieces positioned in the retainer around the through hole, wherein the first and third elastic pieces are connected to the LED tube drive circuit board and the second and third elastic pieces are connected to the fluorescent tube drive circuit board;a starter; anda switch positioned in the first connector and having one end connected to the positive terminal of the power supply and another end connected to an opposite end of the ballast, wherein the switch is normally closed to bypass the ballast;wherein when the LED tube is mounted to the first and second connectors at a first position, the insulating pins of the LED tube are respectively connected to the first elastic pieces of the first and second connectors, the conductive pins of the LED tube are respectively connected to the third elastic pieces of the first and second connectors, the starter is connected between the second elastic pieces of the first and second connectors, the another end of the switch and the opposite end of the ballast are connected to the third elastic piece of the second connector and the third elastic piece of the first connector is connected to a negative terminal of the power supply; andwherein when the fluorescent tube is mounted to the first and second connectors at a second position different from the first position, the conductive pins of the fluorescent tube at one end thereof are respectively connected to the second and third elastic pieces of the first connector, the conductive pins at the other end of the fluorescent tube are respectively connected to the second and third elastic pieces of the second connector, the starter is connected between the second elastic pieces of the first and second connectors, the another end of the switch and the opposite end of the ballast are connected to the third elastic piece of the second connector, the third elastic piece of the first connector is connected to the negative terminal of the power supply, and the switch is open to cause electrical current from the positive terminal of the power supply to flow to the third elastic piece of the second connector via the ballast. 2. The tube holder as recited in claim 1, wherein the each of the first, second and third elastic pieces has an arced configuration. 3. The tube holder as recited in claim 1, wherein an opening is defined in the retainer of the first connector and extends from an external lateral surface to a sidewall thereof surrounding the through hole, and communicates with the through hole. 4. The tube holder as recited in claim 3, wherein the first connector further comprises: a second groove defined in the retainer thereof opposite the opening; andat least one buffer pad formed on the side wall, between the opening and the second groove, the opening, the second groove, wherein the at least one buffer pad separate the first, second and third elastic pieces from each other. 5. The tube holder device as recited in claim 4, wherein a length of the third elastic is about half of a perimeter of the through hole, and lengths of the second and third elastic pieces are both about a quarter of the perimeter of the through hole. 6. The illumination device as recited in claim 5, wherein the switch is positioned next to the second elastic piece of the first connector and wherein the switch is moved from the normally closed position to be open by an activation of the second elastic piece of the first connector when the fluorescent tube is mounted to the first and second connectors at the second position.