I'm guessing that this is the Control Bunker:
Actually south-east of the airfield. Some info here; click on the + symbols for more info.
Presumably you have tried MARIO website the Lancashire interactive archive. They may have wartime coverage. The reality is that remains of the actual decoy lighting is very unlikely. If it is just the layout of the lighting then only a vertical wartime aerial photograph is likely to show it.
Photo on Geograph with location (Control Bunker):