I'm on a super budget and will need to carefully select the lights I will be renting for an upcoming film shoot.
The scenes take place in a dark no-natural light location so I plan to create some light shafts coming in through some background windows using hazer and tight focused light beams, then use muslin (or possibly other bounce or shoot-through) as a soft key.
What I'm wondering is what kind of photometrics I can expect from bouncing into the muslin depending on what lights I decide to go with? Obviously distance is a factor, but I'm looking for even some approximations so I know where to start. The rest I can scrim down, dim, or use distance to help me get to where I want to be.
Anyone have any footcandle approximations using a 2k tungsten or 575w HMI, or 1.2kW HMI at 10, 20 or 30 feet away? bounced or shoot-through?