changing the lighting (or indeed any property) of a view panel is done via the modelEditor MEL command. most of the hotkeys you can see in the hotkey editor are in fact complex pieces of MEL code, so even something simple like "Use Default lights" is 10 or more lines of MEL code which checks the type of pane, and all sorts of other things before finally changing a minor flag of the modelEditor command....
anyway.. enough waffle. To do what you want you need to create a new hotkey with this MEL as the command:
CODE
modelEditor -e -dl "none" getPanel -wf
;
:nathaN