A user may need to activate the Pearl camera light when ambient lighting conditions do not allow Pearl to capture a good picture.
Within Openbook use the hotkey Control+L to toggle the light source on or off.
To activate the light source open JAWS window > Utilities > Convenient OCR > Camera and Scanners > Light (drop down).
Hotkey = Jawskey+space, O, A layered keystroke
Light adjustment is not supported in third party applications even with FSCam driver installed.