Light & Motion Nightsea Camera FilterThe Sola Nightsea uses blue LEDs that cause certain proteins, minerals, and chlorophyll to fluoresce. The camera filter completely blocks out the visible blue light that reflects from the subject. In that way, you can successfully photograph the psychedelic and bright patterns of fluorescence Yellow barrier filter blocks visible blue light to properly see and photograph fluorescence Included filter bungee which secures the filter to the camera set up.