Fig. 3. Morphology of ‘Green Oak Leaf’ lettuce under different light sources of a/A (FL), b/B (R), c/C (B), d/D (RB), e/E (FLB), and f/F (FLR). Lowercase and uppercase letters
respectively indicate 18 and 50 DAS. The bar on the right of ‘f’ indicates 4 cm.