Hi!
Sorry about my late answer, been away way from here for a while.
Great to hear that you like my work, appreciated! Painter won't stay in picture if he's wearing dark clothes and keeps moving all the time. And of course, the camera settings play important role also. It depends on how much there's ambient light. If there's street lights near or something else that is bright, you have to set the camera as insensitive as possible and use brightest light tools you have. Maybe ISO 100 all the time and vary aperture between f/6.3 and f/22.
I use cheapo torches, childrens light toys, decoration lights..almost anything that emits light
I often mod normal LED torches to fit my purposes, recycled materials like plastic bags and bottles. My electrician skills are quite poor, so I don't have any fancy light machines to do the job
Just with free hands.
-Hannu-