It seems to have been lit with a hard light. You can tell by the relatively sharp shadows. The light is overhead and central, maybe just a tad bit to the left of center. It could be a bare flash or an incandescent in a small reflector. It is a very simple lighting, there is nothing directly over the top of the table so there is no extra edge light on the flowers at top. It is on a black background probably a piece of black velvet, so there is no chance of shadow on the background. The light somewhat mimics direct sun coming through a sky light.