Hanging plant growth lighting device with spectrum adjustment function

A hanging plant growth lighting device with spectrum adjustment function, comprising:

• a frame comprising a first frame bar, a second frame bar and a connecting portion, wherein the first frame bar is connected to the second frame bar via the connecting portion;
• a power source module disposed in the connecting portion;
• a plurality of light source modules electrically connected to the power source module, wherein one end of each of the light source modules is fixed at the first frame bar and the other end thereof is fixed at the second frame bar;
• a dimming module electrically connected to the power source module;
• and
• a hanging structure comprising a retractable structure, two first hanging rings fixed on the first frame bar and two second hanging rings fixed on the second frame bar, wherein the retractable structure is connected to the two first hanging rings and the two second hanging rings, wherein the retractable structure comprises a first adjusting rope, a second adjusting rope, a first balance rope and a second balance rope, wherein the first adjusting rope is connected to the two first hanging rings via the first balance rope and the second adjusting rope is connected to the two second hanging rings via the second balance rope.