Correct - the idea is mostly for ebay/amazon small packages, gloves, mobile phones and glasses (maybe even shoes though I don't see them as a big threat). Never directly applied to skin nor pointed at face/eyes; I'd probably use some tin foil to reflect part of the light, and use sunglasses as precaution though I need to check if they filter UV-C. Any ideas of sensors that could be used to measure W/cm2?