Stedi C-4 Black Edition LED Light Cube | Spot!!! FREE FREIGHT !!! STEDI CUBE Black 40W Cree LED Spot Light ?? GIANT SLAYING PERFORMANCE. Explosive performance, hence the name C 4. The instructions to our engineers were to hold nothing back, the goal was to produce the most powerful cube light on the market. Mission accomplished. Now the adventure doesn??? t have to stop when the sun goes down thanks to the class leading CREE XM L2 emitter producing 4,200 lumens of light intensity 3 BEAM OPTIONS.