Hi Muskoka,
while I fully understand your frustration, in this case I would like to point you towards Laminar Research (good luck!) - they are allowing to render a limited number of lights without HDR and the logo-lights are far down on our list.
What you may see on other aircraft is a "night" texture that has the glow-cast baked into the texture... or they don´t have a large number of exterior lights, and can preserve one for the logo lights (IXEG: 2 Wheel wells, 1 Taxi, 2 Turnoff, 2 inboard landing, 2 outboard landing, 2 wing illumination, 2 logo lights = 13 total)
Jan