Table 1. Effect of broad band UVA light on bacteria and yeast based on time of exposure.

Microorganism	UVA Intensity (μW/cm2)	Group	Baseline	20 min	% Reduction	Log Reduction	P value	40 min	% Reduction	Log Reduction	P value	60min	% Reduction	Log Reduction	P value
			CFUx107/mL	CFUx107/mL				CFUx107/mL				CFUx107/mL
Clostridioides difficile	2,000	Exposed	0.10	0.08	38.46%	0.21	0.01	0.01	94.12%	1.23	0.003	0.0031	99.21%	2.10	0.01
		Control	0.10	0.13				0.17				0.39
Candida albicans	1,700	Exposed	0.14	0.09	47.06%	0.28	0.007	0.03	85.00%	0.82	0.001	0.0032	98.00%	1.70	0.001
		Control	0.14	0.17				0.20				0.16
Pseudomonas aeruginosa	3,500	Exposed	0.81	0.07	88.52%	0.94	<0.001	No Growth	*	*	<0.001	No Growth	*	*	<0.001
		Control	0.81	0.61				0.93				0.85
Klebsiella pneumoniae	1,300	Exposed	5.90	6.34	15.35%	0.07	0.17	3.34	68.19%	0.50	<0.001	1.53	88.92%	0.96	<0.001
		Control	5.90	7.49				10.50				13.81
Escherichia coli	1,300	Exposed	1.25	0.41	87.61%	0.91	<0.001	0.21	95.00%	1.30	0.001	0.03	99.46%	2.26	<0.001
		Control	1.25	3.31				4.20				5.52
Enterococcus faecalis	2,400	Exposed	9.21	2.99	71.79%	0.55	0.1	0.61	95.86%	1.38	0.01	0.08	99.55%	2.35	0.01
		Control	9.21	10.60				14.72				17.74
Streptococcus pyogenes	1,800	Exposed	1.17	0.68	18.07%	0.09	0.64	0.64	61.90%	0.42	0.001	0.17	87.02%	0.89	0.004
		Control	1.17	0.83				1.68				1.31
Proteus mirabilis	2,400	Exposed	0.62	No Growth	*	*	<0.001	No Growth	*	*	<0.001	No Growth	*	*	<0.001
		Control	0.62	0.59				0.49				0.54
Staphylococcus epidermidis	2,150	Exposed	0.57	0.43	27.12%	0.14	0.01	0.03	95.65%	1.36	<0.001	0.000117	99.98%	3.78	<0.001
		Control	0.57	0.59				0.69				0.7

* No growth observed. Bactericidal threshold of >99.9% or 3 log reduction is met.