Table 2:

Calculated UV spectra measurements, including absolute irradiance levels of UV-A and UV-B and absolute cumulative daily does rates of baseline levels of UV-B radiation during the final exposure period (experienced during weeks 3–6 of the exposure period)

Daily cycle	Absolute irradiance (µW cm−2), 4 h day−1		Cumulative daily dose (kJ m−2)
	UV-B	UV-A	UV-B	UV-A
UV-B treatment	18.41 ± 3.55	132.48 ± 21.67	2.43 ± 0.65	19.06 ± 3.25
Control treatment	1.65 ± 0.64	9.80 ± 1.90	0.24 ± 0.10	1.40 ± 0.29

Values are means ± SD. Abbreviation: UV, ultraviolet.