The optical fibre connects the light to the controller arm allowing the diver to remotely operate the lights when connected to a camera tray. You can control up to two lights simultaneously with one controller arm. For a longer cable length see the 2 meter option (2M Optical Fibre). The Optical Fibre cable can be used with the Remote Control units on the following lights:

VL10000PRC/CB10000PRC/CB11000PBRC

VL15000PRC/CB15000PRC/VL18000PBRC/CB16500PBRC

VL33000PRC/VL36000PBRC