First you need to wrap your pigment in the box statement with a pigment{}
wrapper. Otherwise you get a warning message and a black box because the
way you have it specified POV-Ray is ignoring it. Once you correct this
problem you still have a problem with the location of your light source.
You spotlight tightness makes a fairly small point by the time it reaches
the box and it is rotated away from the camera side of the box. Try the
code below for a starting point and work from there.


#include "colors.inc"

camera {
 location <5,0,0>
 look_at <0,0,0>
}
// create a point "spotlight" (cylindrical directed) light source
light_source
{
  0*x                     // light's position (translated below)
  color rgb <1,1,1>       // light's color
  spotlight               // this kind of light source
  cylinder                // this variation
  translate <40, 0, 0> // <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)
}

// create a box that extends between the 2 specified points
box
{
  <-1, -1, -1>  // one corner position <X1 Y1 Z1>
  < 1,  1,  1>  // other corner position <X2 Y2 Z2>
pigment{color White}
}

-- 
Ken Tyler

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