The Watt is an SI unit of measure (1 Joule / second) so all we have to do is convert statute miles to kilometers. So, he's using a 9.4 × 10 exp 16 watt lamp at a distance of 149,599,999.42272 kilometers.
holmburgers, I presume you are referring to Kodak's instructions for cine film reversal? Kodak says 8600 lux-seconds in the tech sheet for TRI-X Reversal Film 7278. Kodak added a note that it is "~800-footcandle seconds. A 10-second exposure to a common 60-watt lamp at 12 to 18 inches."