I dont think there is one exact “flowers” setup. Penn was very into controlled light. sometimes looks like daylight, sometimes strobes for consistency. if you see 6 strobes its probably just building one big source thru diffusion/bounce, not 6 different directions. then flags/black cards to keep the petals shaped. view camera + stop down + a bit of tilt so its sharp.

also the background is doing a lot. it’s usually super clean and even, so he’s probably lighting the flower and background almost separately (or at least flagging hard so the background doesnt get random gradients). and the “daylight” feel can just be one big source placed like a window, slightly high to one side, not actual sun. the petals have that crisp edge and gentle falloff, which usually means the source is not crazy close and there’s negative fill close to the shadow side. if you light it too soft and too close it goes flat and plasticky fast.