And no marvel; for Satan himself is transformed into an ANGEL OF LIGHT.
Holy Bible / 2 Corinthians 11:14
There have also been ministering angels in the Church which were of Satan appearing as an ANGEL OF LIGHT.
Joseph Smith / Teachings of the Prophet Joseph Smith / Page 214 / 1842
The angel who fell from before the presence of the Eternal God, and became the devil…that being who beguiled our first parents, who transformeth himself nigh unto an ANGEL OF LIGHT.
Book of Mormon / 2 Nephi 9:8-9
We learn from the revealed word that Satan was once an ANGEL OF LIGHT, then known as Lucifer, a Son of the morning.
James E. Talmage / Articles of Faith / Page 56 / 1988
Satan wants us to believe in his false prophets, false healers, and false miracle workers. They may appear to be so real to us that the only way to know is to ask God for the gift of discernment. The devil himself can appear as an ANGEL OF LIGHT.
Gospel Principles / Page 149 / 1997 Edition
ANGEL OF LIGHT.
Bruce McConkie / Mormon Doctrine / Page 35 / 1966 Edition
And exactly what part did this “Angel of Light” play in the founding of Mormonism?
In September, 1823, and at later times, Joseph Smith received visitations from Moroni, an ANGEL OF LIGHT, who revealed the resting place of the ancient record from which The Book of Mormon was afterward translated.
Doctrine and Covenants / Explanatory Introduction / Page 1
It all makes sense now, doesn’t it?