On the first day of Ridvan [1922], although Shoghi Effendi
himself had left Haifa, the Shrines of both Baha'u'llah and the Bab were
electrically illuminated for the first time, pursuant to arrangements made
before the Master's ascension, but, again, supervised by Shoghi Effendi
himself.
(Ruhiyyih Khanum, 'The Priceless Pearl')
