Lights is written in the key of G♯m.
Open Key notation: 6m.
Furthermore, how did Ellie Goulding get famous?
She won a singing competition while in college, and went on to win the ‘Brit Awards’ with her signature brand of “folktronica” music following the release of her debut EP ‘An Introduction to Ellie Goulding’. She immediately made an impact with her unique soprano voice.