Illumination device

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;
• and
• a 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;
• and
• wherein 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.