begin lights (format of 95-06-04)
lights = 4
-1  1  1 0  0.5 0.5 0.5
 1 -1  1 0  0.5 0.5 0.5
 1  1 -1 0  0.7 0.7 0.7
-1 -1 -1 0  0.5 0.5 0.5
end lights