The space lights were developed by… well I think it was Ozzie Morris who first asked for that kind of soft lighting on Oliver, and a chap called… a wonderful electrician called Bill Chitty designed them and it was like a giant dustbin with five or six quartz bulbs shooting downwards and you had like a… a silk in a shape of a dustbin with silk underneath, so no hard light escaped. So you had rows and rows of these hanging space lights, which could give you a good exposure and also a very soft light, shadow-less light. But I didn't very often use those… you wouldn't normally use those in a smaller set because they'd be too overwhelming. They were best used when you had like a street scene to do or if you were trying to create a garden and you've got sort of soft daylight; they were wonderful for re-creating soft daylight, shadow-less. But they came a little bit after… after I'd done Billion Dollar Brain, but they were a wonderful development and I used them later on, on many occasions.