Editor / Game view darker compared when viewed with headset (HTC Vive)

In short, we are currently having problem recording any videos due to game looking very dark both in editor and game view (standalone or started from editor), almost pitch black. However problem goes away when game is played with headset on (HTC Vive). Anything we can do to balance light issues between "monitor view" and headset ?

Example images: http://imgur.com/a/YOJfo

First example from headset, edited with photoshot to match how I see it. Below from editor/game view.