Painting with light

These are test images for planning a project, "Painting with light" now the method is well known and is used in different ways in photography, in these photos the effect for illustration purposes has so far only been created digitally artificially, using an LR preset which was originally created for a completely different purpose, but it darkens the photo around the areas of three of these photos that were illuminated in real time.
Here in this video, On the video channel of "Newcastle Photography College" it is explained well in my opinion youtu.be/RdTSZHdML-E