Here is a fascinating account of the Light of Sayyidi, Rady Allahu ‘anh, as a phenomenon with characteristics unique to itself and independent of the light from which angels, etc., were fashioned. Subhan Allah.
“Allāh, Exalted is He, then commanded this sacred bird to look to the four quarters. When he obeyed, he saw that four lights had been created. These were the lights of our Masters Abū Bakr the Veracious, ‘Umar the Discriminator, ‘Uthmān and ‘Alī, may Allāh be pleased with them all.“
Irshad: Wisdom of a Sufi Master | Fourth Discourse—page 79-83