Most at-home red light therapy devices rely on light-emitting diodes (LEDs) and are often underpowered (i.e., with a low irradiance). Medical-grade devices used in-office by board-certified dermatologists and estheticians often use a combination of lasers and LEDs with sufficient power output to provide the proper dosage and strength (light energy). Lasers offer a much narrower light beam, which translates into better tissue penetration than the wider light cone emitted by LEDs. Additionally, many consumer-grade devices rely on a continuous light beam, which necessitates a lower power output to avoid damaging skin tissue. Medical-grade devices rely on pulsed wave light that allows for a higher light intensity that doesn’t damage the tissue. However, I consider the products mentioned in this article among the best at-home light therapy devices that have been shown to be highly effective.