It all depends on the light's attributes. Try this: Create a pointlight and look at the tabs. Now in the pointlightshape1 tab, look at the light effects section. Click the box next to light glow. *Boom* there's yer opticalfx1 and pointlight1 tabs. Use the buttons near the tabs to navigate all the light's attributes.
"Terminat Bora Diem, Terminal Auctor opus."