Coastal 9C: what light survives

Coastal 9C: the light that survives here peaks at 550 nm, Secchi depth about 1.1 m. Which lure colour stands out, computed rather than charted.

Light that survives best here: 550 nm

Secchi ≈ 1.1 m

What this water lets through

1 m 3 m 10 m 400450500550600650700
K_d is the diffuse attenuation of the light coming down; c is the beam attenuation along the line of sight. Confusing the two is the classic error in this field.
λ Kd c 1 m 5 m
400 nm 1.600 10.398 20.2% 0.03%
430 nm 1.293 9.532 27.4% 0.16%
460 nm 1.042 8.796 35.3% 0.55%
490 nm 0.814 8.153 44.3% 1.71%
520 nm 0.664 7.621 51.5% 3.62%
550 nm 0.610 7.195 54.3% 4.74%
580 nm 0.638 6.856 52.9% 4.13%
610 nm 0.836 6.665 43.3% 1.53%
640 nm 0.933 6.447 39.3% 0.94%
670 nm 1.045 6.270 35.2% 0.54%
700 nm 1.290 6.223 27.5% 0.16%

K_d is the diffuse attenuation of the light coming down; c is the beam attenuation along the line of sight. Confusing the two is the classic error in this field. Method and sources

Lure table

Ranked by how much each colour stands out to a Largemouth bass in these conditions.

Colour Contrast Seen from Fish view
1 White
94
74 cm Buy now
2 Chartreuse / white Fluorescent finish
89
74 cm Buy now
3 Glow Glow finish — not modelled
88
72 cm Buy now
4 Bone
87
71 cm Buy now
5 Chartreuse Fluorescent finish
83
70 cm Buy now
6 Silver holographic Metallic finish
82
70 cm Buy now
7 Pink / white Fluorescent finish
77
74 cm Buy now
8 Clown
76
74 cm Buy now
Stands out least
Smoke
0
33 cm
Olive
0
33 cm
Watermelon
0
23 cm
Green pumpkin
0
20 cm

Contrast quoted at 55 cm viewing distance. · Light that survives best here: 550 nm

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