I am assuming you are referring to the fiber optic snoot project, if so I used 1.5mm.
yes I literally used blue and yellow acrylic for this project. since I have not used nightsea products I cannot comment on the wavelength differences but I did have to do a bit of post processing. The fluorescence was there but in some instances the background fluoresence of the tissue was blue and needed to be reduced. I have not had too much time underwater working with different strobe outputs versus fluorescence capture.
Awesome! Please feel free to drop a line if you need any help or have additional questions
DIY Underwater Fluorescence Filters
Fiber Optic Snoot!
DIY Underwater Fluorescence FiltersView Instructable »