Phenotypic comparisons of 4-day-old Arabidopsis seedlings of Columbia wild-type, cry2, and hy4 seedlings grown under high intensity blue light (HB, 50 μmol⋅s−1⋅m−2), medium intensity blue light (MB, 5.5 μmol⋅s−1⋅m−2), and low intensity blue light (LB, 0.6 μmol⋅s−1⋅m−2). Seedlings were taken from the populations used in Fig. 4B.