It is possible to Copy from one light and Paste to another. If you just want rotation and not translation, turn off the the Translation filter before you do the copy/paste. Have the ETC filter on to get other light settings like color and cone angle.
The "Fill" light in the default chor is a Sun light which illuminates over an infinitely wide area. If you need to light only a small area, use a Kleig light.
If setting a low % for the intensity of your "Fill" light has no effect, try deleting it and putting in a new one.