@2Dogsmother ,
Regarding the spelling of "Lightening" in Heavenly White Lightening, I distinctly recall having a conversation with a Kevin Walek, who was then AHS registrar at the time, on this very subject. ( I had asked Kevin about the incorrect spelling). Kevin told me that the hybridizer had insisted on that exact spelling, even when Kevin told him it was incorrect. Jamie's spelling refers to something getting lighter, and we all think of the bolts flashing through the sky, so maybe the hybridizer wished the name to mean something different than we think. So, in this case, and in some others, the hybridizers wish prevailed.
There where several instances when I served as AHS Awards Chair
( and had to meticulously proofread the awards ballot for errors) when a hybridizer submitted one of her registrations for an award. One word in the cultivar name is considered acceptable spelling in Europe, but is spelled differently in the US. I asked her about the spelling, and she said she wanted to leave it. ( she was born in Europe and had registered the spelling that way) Since AHS is the International Registering body for daylilies, spellings in other languages are accepted. ( except people must be very careful with Latin words, as they must not coincide with botanical names of other species.)