I never read Black Lightning comics so I looked it up.
Show is actually pretty faithful in a lot of ways. Same names, ex wife, same villains - the 100, Tobias, daughter has density control called Thunder.
In the comics the other daughter has electric powers as well. I wonder if they will do that here as well.
The original concept back in 1977 for DC's first black super hero was "The Black Bomber" - a white racist who turns black when he gets angry and gains super powers.
Luckily everyone thought that was an incredibly bad idea so we got Black Lightning instead.