...the Project Airbus I downloaded has a separate set of effects for the lights in it's own zip folder..effects.zip. Put the CONTENTS of this folder into your main effects folder and that it. Most a/c use the default set but just occasionally it is done this way.........commoner

A glance at the Lights section of the aircraft.cfg tells you that it is indeed using it's own effects files....ie 320pa......if you really wanted to use the defaults then you could delete the 320pa from each entry in the aircraft.cfg.........either way you will get lights

[LIGHTS]
light.0=3, -13.90, -55.25, 2.45, fx_navred320pa
light.1=3, -13.90, 55.25, 2.45, fx_navgre320pa
light.2=3, -69.70, 0.00, 4.70, fx_navwhi320pa ,
light.3=2, -69.70, 0.00, 4.70, fx_strobe2320pa ,
light.4=2, -13.95, -55.25, 2.45, fx_strobe320pa
light.5=2, -13.95, 55.25, 2.45, fx_strobe320pa
light.6=1, 6.8, 0.00, -5.80, fx_beacon320pa ,
light.7=1, 3.83, 0.00, 8.47, fx_beacon320pa ,
light.8=4, 44.41, 0.00, 3.50, fx_vclight ,