Are Norma and Idomeneo both operas by Bellini?
no
Title: Idomeneo
Passage: Idomeneo, re di Creta ossia Ilia e Idamante (Italian for "Idomeneus, King of Crete, or, Ilia and Idamante"; usually referred to simply as Idomeneo, K. 366) is an Italian language opera seria by Wolfgang Amadeus Mozart.  The libretto was adapted by Giambattista Varesco from a French text by Antoine Danchet, which had been set to music by André Campra as "Idoménée" in 1712.  Mozart and Varesco were commissioned in 1780 by Karl Theodor, Elector of Bavaria for a court carnival.  He probably chose the subject, though it might have been Mozart.  The work premiered on 29 January 1781 at the Cuvilliés Theatre in Munich, Germany.
Title: Norma (opera)
Passage: Norma (] ) is a "tragedia lirica" or opera in two acts by Vincenzo Bellini with libretto by Felice Romani after "Norma, ou L'infanticide" ("Norma, or The Infanticide") by Alexandre Soumet.  It was first produced at La Scala in Milan on 26 December 1831.
Title: Nigel Levings
Passage: Nigel Levings is an Australian stage lighting designer.  He has designed lights for over 400 productions.  He works extensively on operas, and has designed a large portion of Opera Australia's repertoire.  Some of his most significant works include operas such as "The Demon" at the Bregenz Festival and for Zurich Opera; "Billy Budd" for the Welsh National Opera, Opera Australia, Canadian Opera Company, and for the English National Opera; "Nabucco" for Opera Australia; "Wozzeck" for Opera Australia; "L'Orfeo" for Innsbrucker Festwochen der Alten Musik and the Berlin State Opera; "A Midsummer Night's Dream" for the 1994 Edinburgh Festival; "La Belle Vivette" for the English National Opera; "Simon Boccanegra" for the Royal Opera House, Washington National Opera, and Dallas Opera; "Falstaff" for Théâtre du Châtelet; "Idomeneo", "Turandot", and "The Barber of Seville" for the Houston Grand Opera; and "Queen of Spades" for the Dallas Opera.
Idomeneo Norma (opera)