I get that. I am using an external source (in the case of this last set, a flashlight) and just hitting it for a second to pick up little details, like the Sennhieser label on the headphones, or the KT88 label on the tubes in my earlier shots.
But I tried to divert the flash effect by focusing it away from the tubes, but if you look you can see the wall in the reflection of the tube.
I get that flash is difficult... or I guess I should say, something that needs to be mastered. If you look, there are very few pics that I use flash in. I understand how it can create a harshness or wash out a shot. At this stage, I do not understand how to tame it enough, and I would prefer not to use it. However, I thought in these shots I have a unique opportunity to experiment. But now I see I need to do more research.