In article , me
wrote:

How many watt seconds do I need? I'm using a 35mm film camera. I'll be
shooting in my single car basement/garage and a smallish living room.
Ambient light from sun is dim, EV4 at 100 ISO for both.

I'd like 3 lights, main, fill and hair/bg/kicker. I assume the main and fill
should be the same w/s but how many w/s should the other light be? I'm
trying to come up with a ratio like 1/2 or 1/4 as many w/s as main.

I also want more than 3 power levels. I think this would be more versatile
and may be a necessity since I don't have room to move lights further from
the subject to reduce power. What do you think?

I apologize if this question is vague but I have never purchased studio
lights before.
Thank you for your help.
me

For portraiture you don't need much more than 50-100 watts per light.