Cliffnemo:
thank you for your quick response, it was your detailled drawing of the instrument panel on your thread that made me think that you would remember such a system if it existed.
The thread that started my research in this area is over on Britmodeller; Post 11 contains pictures of the lamps in question on the trailing edge of a Mosquito aircraft in the De havilland museum. perhaps you might take a look and see if they ring any bells.
Mosquito Resin or IR Lights - Britmodeller.com
thanks again,
Zotbox