DiamondOilLampCorona
Just a guess, but I am thinking you could maybe dim the existing corona in a graphics app, clone the corona and dim the copy, or find a corona on an old loco you like and use that KUID.
JimDep I have an idea, try this Class Light, or one of the incandescent ones as replacement for head lamp, see if it is more dim?
<kuid:69978:21210> KHC_OilLampCorona
<kuid:69978:21211> KHC_DiamondOilLampCorona
<kuid2:209857:113:2> LIB | R51 Signal Kit | Corona - White (Incadescent)
<kuid2:45324:10104:4> Lunar Corona
<kuid2:876005:102220:1> KVP corona light warm
<kuid2:200687:111085:2> Class Lights Corona White
<kuid:209453:99982> Corona (Yellow)
<kuid:341837:21015> corona lampadaire
<kuid:68213:24004> Corona white diffuse
<kuid:68213:24002> Corona yellow diffuse
<kuid:184525:100125> corona yellow medium low
<kuid2:206816:21013:3> corona_white
<kuid2:103179:38427:1> corona_white
<kuid2:453099:100032:3> Incandescent Headlight Corona