On my V1 the nightshot mode also turns on an IR LED, giving some IR illumination close in.I have no idea. The V3 I have is a 7MP camera that seems it has a filter missing and acts as a full spectrum camera, it also has a nightshot mode that removes the in-camera IR filter. I then put either an orange filter to pull out more color or a 720nm that cuts more of the visible light. Then in PS I usually invert colors. I can't remember the setup on camera or the workflow...
No filters, Panasonic GX1 converted IR camera, 850nm. So pure b&W (no false colour), well after getting rid of the purple.What camera and filters are you using Chris?