Effect of light quality (LQ) and lighting method (LM) on the levels of beta-carotene (beta-car) and anthocyanin (antho) in red romaine lettuce.

Least-square means with standard error of the model (in parenthesis) are shown in the table. Statistical significance of the main and interaction effects of the fitted model is shown below the table. The symbol ‘n.s.’ indicates no statistical significance. The least-square means with a same letter are not statistically different based on the Tukey-Kramer procedure.