What is Low Level Laser Therapy (LLLT)? Low-Level Laser Therapy (LLLT), also known as photobiomodulation therapy (PBMT), is a medical treatment that uses low-level lasers or light-emitting diodes (LEDs) to stimulate cellular function, reduce pain, and promote healing. This non-invasive treatment is becoming increasingly popular for its ability to effectively address a variety of conditions without the need for drugs or surgery. The light spectrum How Does LLLT Work? LLLT work