Table 3. With the target textured plastic, the impact of ultraviolet-C (UV-C) configuration and target orientation, position, and height on Clostridioides difficile attenuation.

Configuration one (three towers positioned triangularly each rotating 360°), configuration two (one tower rotating 360°), configuration three (three towers in a line, each rotating 5°), configuration four (one tower rotating 5°), and configuration five (one emitter rotating 90°), positions one through seven were different positions selected within range of configuration one. Orientation refers to how the target C. difficile carriers were positioned relative to the emitter(s), either facing directly (vertical) or horizontal, height is from the floor, mJ/cm² is the average dose of irradiance recorded by radiometers positioned at A, B, and C about the stand where the C. difficile carriers were affixed. Ctrl = control, CFU = colony-forming units, ctrl CFU is the average of the positive control CFU for positions A, B, and C where each position involved two dilutions, where the number is the same indicates the same experiment and the same set of controls, N=six for the average. The same applies to UV-C CFU, LR = log reduction.

Configuration	Position	Orientation	Height (in)	mJ/cm2	Ctrl CFU	UV-C CFU	LR
One	One	Horizontal	47.5	435.35	6.97 x 107	1.47 x 107	0.68
One	One	45 degrees	47.5	436.72	6.97 x 107	1.17 x 106	1.78
One	One	45 degrees	58.5	435.77	6.97 x 107	1.17 x 106	1.78
One	One	Horizontal	58.5	433.27	6.97 x 107	1.17 x 106	1.78
One	Two	Horizontal	58.5	442.47	6.97 x 107	9.57 x 107	0
One	Two	45 degrees	58.5	436.08	6.97 x 107	5.67 x 106	1.09
One	Two	45 degrees	47.5	441.03	6.97 x 107	0	> 6
One	Two	Horizontal	47.5	436.83	6.97 x 107	5.80 x 107	0.08
One	Three	Horizontal	58.5	438.44	1.17 x 108	4.15 x 107	0.45
One	Three	45 degrees	58.5	437.94	1.17 x 108	1.17 x 106	2
One	Three	45 degrees	47.5	435.72	1.17 x 108	1.67 x 105	2.85
One	Three	Horizontal	47.5	433.55	1.17 x 108	1.43 x 107	0.91
One	Four	Horizontal	47.5	441.37	1.17 x 108	1.29 x 108	0
One	Four	45 degrees	47.5	458.02	1.17 x 108	5.0 x 105	2.37
One	Four	45 degrees	58.5	450.21	1.17 x 108	2.00 x 106	1.77
One	Four	Horizontal	58.5	451.58	1.17 x 108	3.85 x 107	0.48
One	Five	Horizontal	58.5	431.07	1.17 x 108	5.27 x 107	0.35
One	Five	45 degrees	58.5	432.63	1.17 x 108	3.00 x 106	1.59
One	Five	Horizontal	47.5	434.81	1.17 x 108	3.08 x 107	0.58
One	Five	45 degrees	47.5	432.32	1.17 x 108	1.17 x 106	2
One	Six	Horizontal	47.5	434.27	1.17 x 108	9.9 x 107	0.07
One	Six	45 degrees	47.5	433.13	1.17 x 108	1.17 x 106	2
One	Six	45 degrees	58.5	435.8	1.17 x 108	1.00 x 106	2.07
One	Six	Horizontal	58.5	435.53	1.17 x 108	3.10 x 107	0.58
One	Seven	45 degrees	47.5	430.84	1.17 x 108	3.33 x 105	2.55
One	Seven	Horizontal	47.5	431.25	1.17 x 108	0	> 6
Two	N/A	Horizontal	47.5	432.79	5.34 x 107	1.11 x 108	0
Two	N/A	45 degrees	47.5	431.06	5.34 x 107	8.33 x 106	0.81
Two	N/A	45 degrees	58.5	428.56	5.34 x 107	3.17 x 106	1.23
Two	N/A	Horizontal	58.5	431.42	5.34 x 107	2.63 x 107	0.31
Two	N/A	Horizontal	25.5	434.26	3.18 x 107	1.15 x 107	0.44
Two	N/A	Horizontal	47.5	430.56	3.18 x 107	7.70 x 107	0
Two	N/A	Horizontal	58.5	431.26	3.18 x 107	1.63 x 108	0
Two	N/A	Horizontal	47.5	431.77	4.48 x 107	1.08 x 107	0.62
Two	N/A	45 degrees	47.5	433.22	4.48 x 107	1.17 x 106	1.58
Two	N/A	45 degrees	58.5	429.15	4.48 x 107	8.33 x 105	1.73
Two	N/A	Horizontal	58.5	430.22	4.48 x 107	3.03 x 107	0.17
Two	N/A	Horizontal	25.5	427.56	8.07 x 107	1.58 x 107	0.71
Two	N/A	Horizontal	47.5	430.84	8.07 x 107	2.08 x 107	0.59
Two	N/A	Horizontal	58.5	428	8.07 x 107	3.48 x 107	0.37
Three	N/A	Horizontal	58.5	448.55	5.60 x 107	2.57 x 107	0.34
Three	N/A	45 Degrees	58.5	450.32	5.60 x 107	3.50 x 106	1.2
Three	N/A	45 Degrees	47.5	446.31	5.6 x 107	3.67 x 106	1.18
Three	N/A	Horizontal	47.5	445.13	5.60x 107	2.15 x 107	0.42
Four	N/A	Horizontal	47.5	455.98	4.68 x 107	1.17 x 107	0.6
Four	N/A	45 Degrees	47.5	454.24	4.68 x 107	5.00 x 105	1.97
Four	N/A	45 Degrees	58.5	455.79	4.68 x 107	8.33 x 105	1.75
Four	N/A	Horizontal	58.5	455.15	4.68 x 107	2.47 x 107	0.28
Five	N/A	Horizontal	58.5	438.5	2.24 x 108	9.57 x 107	0.37
Five	N/A	45 Degrees	58.5	438.45	2.24 x 108	5.00 x 106	1.65
Five	N/A	45 Degrees	47.5	439	2.24 x 108	4.83 x 106	1.67
Five	N/A	Horizontal	47.5	438.58	2.24 x 108	1.29 x 108	0.24