Divers of the Dark -group started filming a cave diving documentary in september 2012.   www.diversofthedark.com    Underwater filming by Janne Suhonen & Sami Paakkarinen. Surface filming by Jarkko Virtanen & Iisakki Kennil? from Flatlight Films.  www.flatlightfilms.com    Divers and uw-lightning team: Phil Short, Antti Apunen, Jarmo Kuusinen, Harri Urho, Veli Elomaa & Zoltan Varga.    Camera housings by Aquatica.  www.aquatica.ca    Lights by Scubamafia.  www.scubamafia.com