Originally Posted by Jim Wetzel
If water is clear, then green will will attract zooplankton from a greater distance. If the water is turbid, then red is likely to give better penetrance, but will not attract the plankton from as far away as colors on the more green (shorter wavelength) side of spectrum when water is clear.

I have been using black lights (blue colored to UV) to attract flying insects better than other colors, but such light sources penetrate even clear water very poorly. They make the water appear milky close to light source.

I used a UV light at night to make my fishing line glow & had pretty good success. However, it attracted so many flying insects that bats became a problem! Evidently they can neither see nor echolocate fishing line, would frequently run into it.

7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160