You scenes might involve tons of light sources, so your render time goes up and it becomes very difficult to make any big changes and experiment with your lighting — that’s when it gets challenging.
The artist developed a technique that allows artists to be less technical with their lighting and as a result, be more creative.
Jurabaev used Octane renderer for these examples, but please note that this technique can also be applied in any other 3D tool.
You can learn more and get the pack for $30+ here.