light_group
// a light group makes certain light sources only
// influencing certain objects
light_group {
light_source { // light sourc(es) of this group
<100, 100, 100>
color rgb y
}
sphere { // objects illuminated by those light sources
<0, -1, 0>,0.5
pigment { color White }
}
//global_lights // add this to make all global lights
// also illuminating this light group
}