Upper room: shine it well above people’s heads. Since it’s not hitting people it’s ok to use frequencies and levels that would be bad if they.
What about reflected light?
Most surfaces aren’t very reflective in this range. When installing upper room UVC, though, you use a meter to confirm the levels at head height are low enough to be safe.
What about reflected light?
Most surfaces aren’t very reflective in this range. When installing upper room UVC, though, you use a meter to confirm the levels at head height are low enough to be safe.