Spectraly or Spectrally: How To spell?

The word Spectraly is misspelled against Spectrally, an adverb meaning "In the form or manner of a specter."

Spectrally has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings spectra & y which should not be misspelled with single 'L'
Wrong Spelling:  spectra-l-y 
Correct Spelling:  spectra-ll-y 
Explore spell check of Spectrally to spell without errors.