Since NASA discovered that led photo light technology could help plants grow faster in space, leds have been found to speed up human cell growth and are being used to do a range of things, such as heal burns. Dermatologists have also been harnessing the technology’s power to help boost collagen production and quash acne, paving the way for an army of small but mighty at-home wrinkle and blemish blasters. The Tanda Clear+ ($195, tanda.com) aims to fix spotty skin using blue light to shut down the bacteria that causes pimples. The Ansr: Beam ($146, dermstore.com) uses blue light as well, but after five minutes it switches to red, which stimulates collagen to heal acne scarring. “[Many women] who originally bought the device for acne were complimenting us on the positive benefit of reducing the appearance of fine lines and wrinkles,” says Bill Johnston, ceo of Ansr.