Revelation describes the nature of the event that led to Lucifer's demise. It seems to be quite clear that Lucifer and his angels, in rebelling against God, engaged in an act of terrible sin.
7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, 8 And prevailed not; neither was their place found any more in heaven. 9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him. 10 And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night. ... 12 "Therefore rejoice, O heavens, and you who dwell in them! But woe to the earth and the sea; with great fury the devil has come down to you, knowing he has only a short time.” (Rev 12:7-10, 12)
The Bible says of sin and those who engage in it...
4 Everyone who practices sin practices lawlessness as well. Indeed, sin is lawlessness. 5 But you know that Christ appeared to take away sins, and in Him there is no sin. 6 No one who remains in Him keeps on sinning. No one who continues to sin has seen Him or known Him. 7 Little children, let no one deceive you: The one who practices righteousness is righteous, just as Christ is righteous. 8 The one who practices sin is of the devil, because the devil has been sinning from the very start. This is why the Son of God was revealed, to destroy the works of the devil. (1 John 3:4-7)
John 3:16 says...
For God so loved the world that He gave His one and only Son, that everyone who believes in Him shall not perish but have eternal life.
So given the above, and in particular the notion that Christ made available an offer of salvation by grace through faith to mankind, was that same offer made to those angels and indeed even Lucifer himself during/or after the rebellion in heaven?