Red light therapy has become a must-have at-home skincare device, trending for its anti-aging and acne benefits. Now, Amazon’s Summer Beauty sale is making these devices more affordable. But before you buy, we chatted with board-certified dermatologist Dr. William Kwan to determine which red light therapy face mask Amazon deal is actually going to be worth it for you.

What are the benefits of red light therapy?

“Red light has been studied for years and has been found to be helpful for fine lines and wrinkles, skin tone, and acne,” says Dr. Kwan.

With consistent use, red light can reduce signs of aging, promote a brighter, more even complexion, and help manage breakouts.

Does red light therapy work?

The short answer is yes, with some caveats. Not all red light therapy devices are created equal. According to Dr. Kwan, “Masks are superior to wands since they cover the whole face at once.”

While Dr. Kwan confirms that red light masks are the most effective form of at-home red light therapy, he notes that, “The mask should have sufficient energy to get an effective treatment.”