It is working correctly for me. Be sure that you have ambient checked ON in the surface tab by the way or the inside of the sphere will remain black even though the figure is lighted. Also be sure to adjust the intensity or you will get little or no lighting on the figure. I’ll post a render shortly.
yeah i already checked ON the ambient
if you didt check on then the whole image you render will drak
if you checked ON then you can see the background
but the figure still dark if u put the figure inside the sphere
because the normal of lighting is outside whatever u set the scale -100 or +100