Table 1.

Photosynthetically active radiation (PAR) and ultraviolet irradiances during 4 h exposures to Q‐Panel 313 fluorescent lamps filtered with 125 μ m cellulose diacetate

Irradiance (W m−2)
Total UV (280–400 nm)	UV‐A (315–400 nm)	UV‐B (280–315 nm)	PAR (400–700 nm)	CH4	CIE	GEN (G)	GEN (T)	PG	DNA	QUT	FLAV
11.6	6.2	5.4	2.6	7.1	1.4	2.5	2.6	2.3	2.48	2.89	3.25

UV irradiances calculated using a range of common spectral weighting functions: CH₄, idealized spectral weighting function for CH₄ production that decays one decade in 80 nm (McLeod et al. 2008); CIE, weighted with the Commission Internationale de l'Eclairage (CIE) erythemal action spectrum (McKinlay & Diffey 1987; Webb et al. 2011); GEN (G), weighted with a mathematical function (Green et al. 1974) of the general plant action spectrum (Caldwell 1971); GEN (T), weighted with a mathematical function (Thimijan et al. 1978) of the general plant action spectrum (Caldwell 1971); PG, weighted with a the plant growth function of Flint & Caldwell (2003); DNA, weighted with the DNA damage action spectrum (Setlow 1974); QUT, weighted with the pyridine dimer action spectrum (Quaite et al. 1992); FLAV, weighted with the function for accumulation of the flavonol conjugate mesembryanthin in Mesembryanthemum crystallinum (Ibdah et al. 2002).