This RL2 light source has a built-in oil-proof lens to protect the microscope, extend the life of the mirror body, and prevent oil, dust and smoke; Annular light source all-round light without shadow, ultra-thin volume, snap design, easy installation, stepless brightness adjustment; Soft light, positive white temperature, can adjust the required brightness according to the working environment; Uniform, comfortable and humanized anti-glare design, no visual fatigue.