Lighting device with a rotatable suspension structure

A lighting device with a rotatable suspension structure, comprising:

• a suspension structure, comprising a flat plate member, two clamp members, and a fixing member, wherein the flat plate member has a first hole disposed at one end of the flat plate member, the clamp members are disposed on two sides of the flat plate member respectively, and each of the two clamp members comprises a main body and two wing portions respectively disposed at two ends of the main body, the main body has a rotation hole, and each of the wing portions has a bent portion, the fixing member passes through the rotation holes and the first hole, whereby the two clamp members are rotatably fixed to the flat plate member;
• and
• two light tubes corresponding to the two clamp members, wherein each of the two light tubes comprises a tube body having two grooves, wherein the bent portions of the wing portions of one of the two clamp members are respectively embedded in the two grooves of the tube body of one of the two light tubes, and the bent portions of the wing portions of another of the two clamp members are respectively embedded in the two grooves of the tube body of another of the two light tubes, whereby the two light tubes are respectively secured to the two clamp members in opposite orientations.