Using a Variable to SetLightingStatus

Hi All,,
I'm having some issues getting the SetLightingStatus to work correctly by passing in a variable.
So if I set the string variable "LightingStatus" to BEDROOM4 for example and try to pass that in using

SetLightingStatus(BEDROOM4, ON);

Not surprisingly I get an error.

I then tried to add the double quotes to the beginning and end of the string however this also resulted in an error.

Perhaps a translation from the string label into the actual group number would be the better approach, but open to suggestions.

Regs,
Paul