Table 1 UV doses needed to inactivate 63% and 90% of Covid-19 virus in 1.5 × 103 TCID50/mL solutions and derived 63% action spectrum of Covid-19.

From: Solar UV-B/A radiation is highly effective in inactivating SARS-CoV-2

Central λ (in nm)

D63 (in j m−2)

D90 (in j m−2)

63% action-spectrum

254 (UV-C)

3.5

5.0

1

278 (UV-C)

3.5

5.0

1

308 (UV-B)

524

746

6.6 × 10–3

366 (UV-A)

16,488

23,477

2.1 × 10–4

405 (near UV-A)

22,434

31,942

1.6 × 10–4

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