"C-beams were bright lights that could be either handheld on mounted on vehicles like the YT-1300 light freighter. Gelieg manufactured the 20m-cp Strobe/C-Beam Lamp."@en . . . "C-beam"@en . "C-beams were bright lights that could be either handheld on mounted on vehicles like the YT-1300 light freighter. Gelieg manufactured the 20m-cp Strobe/C-Beam Lamp."@en . . . .