Great map! But I have one question. Does this map have indoors? It will be very strange that outside is Apocalypse and inside is everything alright.
Please don't be offended, it's just my opinion.
As far as I know you should write [ACCESSORY_IDs.ACCESSORY_LIGHTHALZEN_AURA] = "_lighthalzen_aura", if you want to change it name in game you can change it in item_db and in idnum2itemdisplaynametable.txt In Lua you must write original name of sprite.
I think that problem is in item_db where you put this sprite. Please check accessoryid in lua there is view id of your sprite and it should be the same in your item db (column View) of your sprite.