Table 1.

Inactivation rate constants (k) for coupons tested for biofilm formation and inactivation in the CDC biofilm reactor when exposed to 280 nm UV LEDs.

Material	k ± S (cm2/mJ)	N0 ± S (CFU/cm2)	Nres ± S (CFU/cm2)	RSE (cm2/mJ)	LRV peak
High density polyethylene (HDPE)	0.0636 ± 0.0328	0.0104 ± 0.214	− 1.19 ± 0.278	0.500	1.17
Stainless steel (316L)	0.200 ± 0.0870	0.0131 ± 0.217	− 1.80 ± 0.170	0.547	1.45
Viton®	0.133 ± 0.0625	0.0300 ± 0.160	− 1.27 ± 0.165	0.346	0.851
Acrylonitrile–butadiene–styrene (ABS)	0.0604 ± 0.0215	0.000644 ± 0.186	− 1.63 ± 0.318	0.458	1.57
Polycarbonate	0.288 ± 0.121	− 0.0260 ± 0.341	− 1.84 ± 0.208	0.592	1.84
Silicone	0.344 ± 0.145	− 0.00932 ± 0.443	− 1.86 ± 0.266	0.976	2.05
Porex (expanded PTFE)	0.228 ± 0.0722	0.0285 ± 0.245	− 1.75 ± 0.164	0.432	1.75
Extruded PTFE	0.131 +  ± 0.0422	− 0.0968 ± 0.288	− 1.84 ± 0.195	0.428	1.84