This is another form of light energy that has been used to treat acne. It uses both light and heat to eradicate the cause of acne. It also destroys the acne causing bacteria and reduces the production of sebum. This helps to shrink the sebaceous glands. Improvements are often seen as early as 30 days and sessions are as short as 10 minutes. This therapy has also been approved by the FDA, but it is used to treat mild to moderate acne.