TABLE 2.

Assumed UV‐C reflectance for Experiment 1 chamber surfaces.

Room surface	Material	Reflectance (%)
		222 nm 21	254 nm 22
Floor	Concrete	6.1	14.9
Walls and ceiling	White painted drywall	7.8	6.7
Windows	Polycarbonate	8.2	8.2 a
Panels and door	Stainless steel	28.9	24.5
Panel	Wood	8.6	4.7

^a No reflectance value was available for polycarbonate using a 254‐nm source, so it was estimated based on the reflectance value using a 222‐nm source.