Quote:"I will post works of art taken using some or all natural light and I'd like you guys to tell me how difficult / expensive it would be to reproduce the results purely with artificial light, if its even possible at all."
The key here is that I've actually worked as a professional portrait shooter,and as a small-product shooter,and have worked with studio lighting since 1987. NONE of the "art" you show has sophisticated lighting, and all four of those photos could have easily been made with the following equipment. Photo #2 is absolutely amateurishly lighted BTW.
ONE 600 to 800 watt-second power pack and three flash heads, plus a large (48 x72 inch) scrim fitted with a transparent white fabric. Three light stands. The window itself could easily be "faked/re-created" with one light shot through a layer of diffusion material,and the window frames would be purchased at Home Depot for the cost of, well, some window moulding. I used to work at a studio where we had a complete double-door window set that took about three hours to build,and which had been used for 20 years, with new curtains fitted every few years.
The comment "if its even possible at all" to re-create the type of lighting you show in those four shots is telling us that you really do not have the understanding to fathom that the samples you picked are dead-easy,simple natural light photos that could be EASILY re-created with one power pack and a few light heads and some simple tools like a PVC scrim and some light stands,a handful of clamps, fabric, wood paneling. Buying a well-known professional pack-and-head system like Speedotron Brown Line, the _entire_ range of samples you link to could be easily purchased on the used market for about $800,including all light stands.softboxes, umbrellas, reflectors, and loads of ancillary stuff. Seriously. Not one of the four photos you link us to would be difficult to shoot--or to shoot and light significantly better,using studio flash. And, every one of those photos could be shot on-location, or at night, using just one scrim and one softbox and either two or three light units. Adding a fourth light head would improve each of the photos and elevate them to the level of true professional portrait lighting.
The first photo could be done with one light and a softbox or umbrella. The second photo is a terribly lighted, backlighted photo that is very amateurishly executed; bringing in some fill light from the front would have prevented the horrible blown out skin tones. The window has distracting elements in it; it would have looked significantly better if a "fake" window would have been backlighted by two light heads with 100 watt-second each firing toward the camera, and one main light camera left firing at 400 watt-seconds. A cheap Speedotron 604 pack and three cheap M90 light heads, a $400 used outfit, would have lighted all four shots, and done it better with the addition of a 48x72 inch PVC frame (Home Depot, $16) and $12 worth of ripstop nylon from JoeAnne Fabrics.
The girl with the braided hair? One light head a shot through a 36x48 inch gridded softbox would have lighted that very much identically, but would not have blown out the details on the bustline area of her gown. One light shot through a $28 homemade scrim could have lighted the girl with braided hair.
The man's hand's and the baby's feet? One used 400 watt-second power pack and one $65 light head plus the $28 frame+ fabric scrim--total used cost, today, from
eBay $100 for a D400 pack and a $65 light head, plus the $28.