SpotLight

  SpotLight { 
      exposedField SFFloat ambientIntensity  0         # [0,1]
      exposedField SFVec3f attenuation       1 0 0     # [0,)
      exposedField SFFloat beamWidth         1.570796  # (0,/2]
      exposedField SFColor color             1 1 1     # [0,1]
      exposedField SFFloat cutOffAngle       0.785398  # (0,/2]
      exposedField SFVec3f direction         0 0 -1    # (-,)
      exposedField SFFloat intensity         1         # [0,1]
      exposedField SFVec3f location          0 0 0     # (-,)
      exposedField SFBool  on                TRUE
      exposedField SFFloat radius            100       # [0,)
    }