Yes, UVC light is harmful.

Safety precautions

  1. You must wear UVC protective eyeglasses such as these:

    BlueMarble Air Care Systems will provide these glasses to the installers and service personnel at no cost for your protection.
  2. You must wear long sleeves shirt, pants and latex or work gloves so no part of your skin is exposed directly to the UVC light.
  3. Do not look directly at the UVC light.
  4. Do not expose skin under the UVC light.