1018 B
anything that becomes visible is light
"people can clearly see everything that comes into the light." The Bible often speaks of God's truth as if it were light that could reveal the character of something.
Awake, you sleeper, and arise from the dead
Possible meanings are 1) Paul is addressing unbelievers who need to wake up from being dead spiritually just as a person who has died must come alive again in order to respond, or 2) Paul is addressing the Ephesian believers and using death as a metaphor for their spiritual weakness. (Isaiah 26:19, 51:17 and 52:1)
the dead
This expression describes all dead people together in the underworld. To arise from among them speaks of becoming alive again.
you sleeper ... shine on you
These instances of "you" refer to the "sleeper" and are singular.
Christ will shine on you
Christ will enable an unbeliever to understand how evil his deeds are and how Christ will forgive him and give him new life, just as light shows what is being hid by darkness.