// create a regular "spotlight" (directed) light source
light_source
{
  0*x // light's position (translated below)
  color red 1.0  green 1.0  blue 1.0  // light's color
  spotlight // this kind of light source
  translate <40, 80, -40>   // <x y z> position of light
  point_at <0, 0, 0> // direction of spotlight
  radius 5       // hotspot (inner, in degrees)
  tightness 50   // tightness of falloff (1...100) lower is softer, higher is tighter
  falloff 8      // intensity falloff radius (outer, in degrees)
 }