I'll be gaffing a night interior shot on 200T film in a few weeks. The idea is to have a very blue moonlight through the window(s), and have the tungsten sources inside register as warm. It's a low budget short so there will only be one moonlight fixture (and a bunch of dimmed tungsten inside)
DoP doesn't want the hard light from a pure HMI. I assume we will want to be able to shoot out the windows.
My ideal fixture would be a daylight balanced maxibrute, which gives a window-sized source and a fairly focused beam. But I'd need more than full CTB to get the color we want, which is a real waste of energy.
Is there a type of diffusion I can use with a 1.8kW Arrimax HMI that maintains the light direction and (somewhat) intensity while increasing the source area? My experience with stuff like Lee 250 and 216 is that it goes everywhere, and throw is lost. A grid on standard diffusion isn't the solution either, as a lot of light is lost when it gets absorbed by the grid. I don't mind doing double diffusion like in a softbox as long as it somewhat keeps its direction while getting softer.
Thanks in advance