Once again, IF confirms these positions in verses 6 and 7. It's ONE OR THE OTHER. There is no third camp of saved believers walking in darkness or lost unbelievers walking in the light.
Descriptive of lost unbelievers.
Descriptive of saved believers.
When we place our faith exclusively in Christ for salvation/believe the gospel by trusting in His finished work of redemption as the all sufficient means of our salvation, we then become
"servants of obedience unto righteousness.
"Believes unto righteousness" (Romans 10:10) "but to him who does not work but
believes on Him who justifies the ungodly, his
faith is accounted for righteousness" (Romans 4:5) = saved. It doesn't sound like you will ever figure this out.