Slope^b

R²

Prob.^c

Response pattern; functional form^d

Blue (400 - 499 nm)

‒

0.724

0.015

Monotonic; double-log linear

B’ (425 - 474 nm)

‒

0.908

0.001

Monotonic; double-log linear

C (475 - 524 nm)

‒

0.584

0.046

Inverted-V; double-log linear

Green (500 - 599 nm)

(‒)

0.634

0.032

Inverted-V; linear

G’ (525 - 574 nm)

(‒)

0.507

0.073

Inverted-V; linear

Y (575 - 624 nm)

+

0.533

0.063

Monotonic; linear

Red (600 - 699 nm)

(‒)

0.877

0.002

Inverted-V; linear

R’ (625 - 699 nm)

(‒)

0.944

3E−04

Inverted V; double-log linear

Far red (700 - 780 nm)

+

0.819

0.005

Monotonic; linear