Acne Treatment Plan Acne IPL treatments are an excellent treatment for “Propion Bacterium Acnes” the bacteria responsible for Acne. The white light spectrum used by IPL, contains Blue light (475nm) which has been found to have a dramatic effect upon the Acne P Bacterium. The light causes the bacteria to be killed and this allows the acne to heal and the skin to clear. Acne can easily be treated with IPL as only the acne lesions need to be pulsed. The IPL light pulse does not need to be strong to be effective IPL can be applied after or at the end of an acne facial treatment as a bonus step.