TABLE 3.

Influence of LEDs and HPS supplementary lighting on carotenoid concentration in tomatoes.

	Carotenoid concentration in tomatoes (μg g–1 DW)
Light treatment	Lycopene	ß-carotene	Lutein
LEDs	910.3 ± 53.3b	44.4 ± 3.0a	24.7 ± 3.3b
HPS	773.8 ± 45.1a	46.2 ± 3.5a	10.2 ± 3.0a

Values represent means of three repetitions per light treatment in three consecutive weeks (n = 3) ± standard deviation. Values followed by the same letter do not differ significantly according to student’s t-tests (p < 0.05).