Dashcam distributor and installer BlackboxMyCar of Canada got to test the BlackVue DR650GW-2CH IR (wich packs an interior IR camera instead of the regular rear cam). They posted this screenshot comparison with and without light, showing how clear the video can be even in pitch black lighting conditions.
You can see the performances are quite impressive for such as discreet model, and anyone driving a vehicle for a living (taxi, truck) should be highly interested in this model.