Depending on the type of retinol you are using, it may be quite harsh/sensitising on your skin, especially when combined with light. So applying retinol before LED treatment is not recommended. In fact, light skin absorption is maximum when it is cleansed with nothing applied on it. You can always apply actives after treatment…
An LED mask is typically 6 to 20 times weaker than the best professional LED device
LED light therapy (phototherapy / photobiomodulation) is used to treat a variety of aesthetic and health concerns, most commonly skin ageing, skin wounds/burning, diabetic wounds, psoriasis, hyperpigmentation, acne, seasonal affective disorder, sports injuries and back pain, among others - and to enhance the effectiveness of other treatments, such as radiofrequency or ultrasound. Red and infrared light wavelengths are used for all the above concerns, except from blue wavelength, which is used for acne and psoriasis. LED devices come in the shape of masks, panels and dome/canopy style...


