Lights are sorted by the folder, then alphabetically in the folder.
If you separated lights out of their folders and made a separate folder for each light, it would be alphabetical.
YOUR ADD-ONS FOLDER
Light_AWesomemans (Folder) (Which has inside)
Arobic awesomness
Doobly Light
Goober Snhoober
Light_Brickmans_Ambetient (Which has inside)
Ambetient red
Ambetient blue
Now in the wrench menu, they would show up like this
Arobic awesomness
Doobly Light
Goober Snhoober
Ambetient red
Ambetient blue