Table 2 Interaction of genotype and light on growth indices in two lemon balm genotypes under different levels of light (Data in the table represent means ± SE and different letters indicate a significant difference at the probability level of 0.05 based on LSD test)

White LED

29.65 ± 2.55^b

25.46 ± 0.04^c

4.7 ± 0.2^c

3.74 ± 0.1^e

387 ± 17^d

317 ± 17^e

Red + Blue LED

44.32 ± 1.1^a

45.11 ± 0.66^a

7.17 ± 0.4^a

7.74 ± 0.2^a

646 ± 20^a

688 ± 15^a

Red LED

32.6 ± 0.5^b

42.26 ± 2.54^a

5.53 ± 0.1^c

6.4 ± 0.3^b

556 ± 50^b

544 ± 6^b

Blue LED

30 ± 3.97^b

22.25 ± 0.12^d

4.70 ± 0.1^d

3.39 ± 0.04^f

253 ± 22^e

330 ± 49^e

Greenhouse

22.82 ± 1.04^d

18.4 ± 0.63^e

3.54 ± 0.4^e

3.54 ± 0.1^e

469 ± 12^c

213 ± 40^f