The 18th episode of season 5 of The Flash TV show is entitled "Godspeed" and Godspeed (aka August Heart) is in that episode.
He has white lightning, just like Savitar, but he is not invisible for humans and visible for speedsters. We didn't really get an explanation about how he gets his powers and the white lightning. We know that white lightning can be a result of gaining speed powers from the Philosopher's Stone.
How did Godspeed get white lightning then?
The Philosopher's Stone is supposed to be destroyed. And, in the comics, he has yellow lightning, making things more confusing.