It's too bad you can't throw some light through the window to add a bit of pop.
+1. The back wall, especially frame left, needs to be raked with something to give the shot more contrast. I wouldn’t automatically assume an HMI is out of your budget. You can probably rent 4k HMI Fresnel with magnetic ballast for very little money and power it off a 240V wall receptacle like a dryer or range outlet with the help of a transformer/distro. I did something very similar to create a warm sunny feel for an iRobot commercial that was shot on a rainy day (see pictures below.)
Master shot of an iRobot commercial lit with a 4kw HMI Par (outside) & 1.8kw HMI Par (inside) powered from a 30A/240V dryer outlet through a step-down transformer/distro. Note: Sunny feel created by 4k Par on an overcast day.
If you look at the breakers of dryer and range outlets you will notice that they use two pole breakers - either 30A or 50A. Each pole of the breaker is in a sense an independent 30A or 50A 120V circuit. That is, if you measure the voltage from each pole of the breaker to ground it will be 120 volts, and if you measure the voltage between the two poles of the breaker you will notice that it is 240 volts. The 120 volts of the two poles adds up to 240V because the 120V circuits are on opposing legs (and are therefore additive.) In residential settings, this is how higher voltages are supplied to household appliances like Dryers, Electric Ranges, Air Conditioners, Motors, etc. that require more power than can be reasonably supplied by a single 120V circuit.
Left: Transformer/Distro plugged into a 30A/240V dryer outlet. Right: 4K HMI Par under rain protection powered by Transformer/Distro
To operate a 120V 4kw magnetic ballast from a 240V circuit requires a 240v-to-120v step down transformer like the 60A Full Power Transformer/Distro we make for the Honda EU6500is generators. Like it does with the 240V output of the Honda EU6500is Generator, our 60A Transformer/Distro can convert the 240 volts supplied by these household receptacles back to 120 volts in a single circuit that is the sum of the two single-phase legs of 30/50 amps each. That is how our 60A Transformer/Distro makes a 60A/120v circuit out of a “30A/240v” or a “50A/240v” circuit and is capable of powering bigger lights, like 4ks with magnetic ballasts, 5ks, or even a 6000W Six Light Mole Par that will make the background of shots pop.
Left: Arri AS18 1800W Par powered from Transformer/Distro. Right: 4Kw and 1800W HMI ballasts powered from Transformer/Distro.
By giving you access to more "house power" through common 240V household outlets, a Transformer/Distro can eliminate the need for dangerous tie-ins or expensive tow generators to power larger lights (use this linik for details.)
Guy Holt, Gaffer
ScreenLight & Grip
Lighting Sales & Rental in Boston