Spot lights point in a direction and focus in a cone

SpotLight {
    # Standard fields, plus:
    location 0.0 0.0 0.0
    direction 1.0 0.0 0.0
    beamWidth 1.57
    cutOffAngle 0.785
    radius 1.0
    attenuation 1.0 0.0 0.0
}