Shot in crash test barrier facility, all the lights were (boiling!) hot tungsten lights. There were a total of 84 lights, including the ones lighting the front of the car which you can't see in the shot.
The results? Absolutely boiling hot conditions, the paint (which was one off and uber expensive) started to bubble and the metal on my tripod was too hot to touch with your bare hands.
The yellow cast from the hot lights had to be balanced back.