After doing some tests last year and talking to several myrmecologists, I came to conclusion which wavelength is around best range and purchased high quality 50W LED and driver. I have installed it and tweaked the previous design a bunch. Current pictures don't reflect the latest version with Al. tape used for UV reflection. I will add more pictures when I can to show more or less the completed design 2.0.
https://photos.app.g...MuwSoKPX97Dze96