Select a surface and pick a point where you want to have a highlight.
The script places a point, spot or directional light based on the current
view of the active viewport while evoking the script.
The script calculates the basic parameters of the lights. Here you can
edit the "brightness" of the lights or the radius calculation
of spot lights. Further you can select to keep the construction lines.
This script creates the bounced construction lines. These lines may help
to setup the environment surfaces that may be reflected in raytraced renderings.