couldn't get better stills so this youtube screen grabs will do, this was a project i recently shot

key light = 4ft kino flow thru frame of 216 with 3200 bulbs
back light = 4ft kino thru 216 one bulb only (if i remember well)
circular gradient = arri 650 scim and on a dimmer
we didn't have any light on the seamless just the fresnel 

Note: the director and producer insisted that the effect was done by painting the white cyc to gray (or desired color) they were planning to paint on the day of the shoot the whole cyc, thankfully me and my team pulled it off, saving them money and earning their respect.