Recently bought a Krakken 3500 dive light. It has a setting where some blue and some ultraviolet LEDs come on for night diving. I'm intrigued, but have no experience. I read that you need to use yellow filters (both mask and camera) to really make it work well. I'm wondering if just playing with the white balance on the camera might eliminate the need for a filter. Also wondering where one gets a yellow filter for the mask.