Light treatment sessions of 30 minutes to 2 hours each day are often advised. It depends on your skin type and how much you require. Generally, a session lasts for about a month, although you may need to stay in the bed for up to two years for complete relief from acne. Acne is a common problem that many people experience at some point in their lives. It's defined as an inflammatory disease of the sebaceous glands that causes blackheads and whiteheads. Acne can be mild or severe; depending on the case, different treatments may be needed. For example, if your blackheads are not causing any problems, they may not need to be removed. However, if they're causing you pain, then they need to be cleared away so they don't lead to scars or permanent damage to your skin. Red light therapy uses ultraviolet A (UVA) rays to destroy bacteria and control inflammation. This treatment works best for people with moderate to severe cases of acne who haven't been responding to other methods. During a session, you will lie in a specially designed bed that allows only UVA rays to reach your skin. You will need to remain in the bed for approximately 30 minutes per dose. After several months of using red light therapy, most patients report significant improvement in their acne condition.