On a project coming up, I will be shooting a film lit entirely from a single light source. In the film, there is no light on earth until the character discovers an orb of light, which he brings back to his village. I have been doing some camera tests with china balls, but my main problem is finding a fitting "orb" for the film. I have looked around, and have not really seen much of anything that would suit my needs. I need something that would preferably be around 6-10 inches, battery powered, and at least 100W. Any ideas?
Shooting 5D, Cinestyle. Screencap was taken from test footage shot at iso160, 50mm f/1.4 with the Technicolor LUT applied, but no CC.