Portrait painting - painting the light

Hello everyone, how are you all today? I hope everyone is having a great day.
today i made a new digital portrait painting. I really just wanted to see if i could paint light that has this huge contrast between them.

making this drawing was a really enjoyable process and it was also very quick.
and did i mention that the painting was done on one layer? Thats why it was so much more fun.

let me know your thoughts.

here are some process shots:

Reference image