Got the same problem, but I just fixed it
Don't know the erj version, just bought it last week though.
P3D4.3
Aircraft.cfg states that the lights used are not the default ones:
[LIGHTS]
light.0 = 3, -12.4, -31.90, 2.52, fx_navred_E1X5 ,
light.1 = 3, -12.4, 31.90, 2.52, fx_navgre_E1X5 ,
light.2 = 2, -12.6, -31.95, 2.53, fx_strobe_E1X5 ,
light.3 = 2, -12.6, 31.95, 2.53, fx_strobe_E1X5 ,
light.4 = 1, -6.12, 0, -1.60, fx_beacon_E1X5 ,
light.5 = 1, 1.21, 0, 8.76, fx_beacon_E1X5 ,
light.6 = 10, 32.50, 0, 7.25, fx_vclight ,
I just deleted the _E1X5 (left the space before the , though) and all working now. As I said, I bought the product last week so there must be a little bug in the aircraft.cfg embedded in the installer.
Cheers
kano