What camera settings is best for 4 light high key studio photography?

Nikon d31oo 4oow main light 3oow fill light 2 backlights 25ow with umbrella on white backdrop

Manual is the best setting.

But… If it was me, I would want more light than that (especially on the background). There are times when 3500w (2- 1000w and 2- 750w are not enough, once you factor in the distance to subject)

So you are not going to set the exposure by checking the light meter?

Successful high key work depends on the lighting more than anything else. Here's a tutorial.http://www.studioonashoestring.com/22/high-key-portrait-lighting-tutorial-2/

Loads of light so you can keep your iso low, 200 or 400. Aperture.depends ont he background but let's say about f5.6-f8. Shutter speed, whatever you need to get high key, you'd need your meter to confirm that.

Use a light meter… Either a handheld one or at the very least, the one built into your camera and expose for your model.

Blow out your background and expose your model correctly… This means that your background lights will need to be quite a bit more powerful than the light for your model.

Control your light to avoid you background light spilling directly onto your sebject.

I would do this shot with 3 lights… 2 for the background, one for the model.

Meter the background… With 250ws lights I'd be turning them up to full power.meter to get the desired pattern (usually even lighting for high key).

Your subject lights should be 1 to 2 stops less power than the BG lights. Make sure that your subject is well removed from the BG to stop any spill or reflected light impinging on them.

Personally I'd meter the BG lights for f/16, and set the key light f/11 and fill f8 or 5.6… But at ISO200 you'll struggle to get f/16 with 250ws. You will probably need to swap your lighting around.

Not sure why umbrellas on the BG… I'd be using spillkills, but hey maybe that's all you have?

Your camera should be set to Manual in the studio.

You lights will dictate your camera settings. Turn off all lights but your key light. Then adjust your camera for the exposure or look you want. Then turn on the rest of the lights and move them around until you get the modelling you want. If the bg is a white backdrop, it's pretty to adjust the luminance afterwards in Photoshop.