There is no UV (UVA/UVB), so Ultra Light LED is very safe, and with little to no adverse effects. With no downtime or redness its a great weekly or daily part of a regimen skin care. Be advised to discontinue Accutane or Retin-A, or retinoids, as your skin may become photosensitive to possible heat and have a reaction.  Always take it slow and proceed with caution with the use of this device or other electronic products.