An LED bulb includes an LED photoelectric module having at least two branches of LED beads with different color temperatures connected in parallel, a control switch connected with one of the branches of LED beads, and an adjustment ring. A total voltage of one branch of LED beads is less than that of each of the other branches of LED beads. The control switch has a ball, the adjustment ring has a magnet, and when the adjustment ring rotates, the magnet draws the ball to roll to switch on or off the control switch. When the control switch is on, the branch of LED beads connected with the control switch is lighted up, and when the control switch is off, the branch of LED beads connected with the control switch is not lighted up.