At pivotal point in the interrogation scene the detective slams an evidence bag on the table containing Brad's wallet. We go into brads mind, we see the pressure build on him represented by the harsh blue toplight on both him and the evidence bag. This was my shot to set up and I achieved the effect by lighting Brad with the top lights and then naturally washing out those specific effects with more naturalistic lighting around the scene.
I think the effect works really well, it really emphasises the pressure on Brad and emphasise that he knows its his wallet and that he is in trouble. We tried the scene without the lighting on Brad changing, just with a spot tightening on the wallet but the change wasn't drastic enough.
I think we have achieved an effective lighting change, although it isnt narratively explainable I think it is justifiable as a subjective insight into Brad's mind. We will have to cut to a reverse shot to take the audience back out of the internal diegetic shot but it should work nicely.