The way I was taught from Dfang and Hrntfxr, to "move" your light "beam, glow, cone" what ever you wish to call it, posi, X is left/right. Y is front/back. Z is up/down. Its a INI dance to find the happy place. Put it where your happy with the light housing/fixture is, then I usually go from the pilots view to start, then work around from outside.
It will never look the same from diffferent points of view, so dont be fooled into thinking "that aint right". You may be happy coming in to land with the placement, then say oh crap that looks like hell from 1/2 mile out using the F6 or F10. Like I said, INI dance.
You can do amazing things with them. Also Brightness= bigger is not always better. You can take a 0.02 bulb and make it look like the sun using LightSrcRange= and LightSrcOffset= zero being the lowest and increase from there.
I do the YAP cockpit lights mostly with a 0.01 brightness= and use the LightSrcRange= to compensate for "glow" effect. Using LightSrcOffset= to "place" the illumination where I want it. X=side to side, Y=Front to back, Z=up or down.
Anyone with other expertise, ideas, suggestions or tips please chime in. Even contradictory comments. No problem.