Somebody will find this comment one day
Wouldn't "ich heiße Lukas" be a more idiomatic translation than "ich bin Lukas"?
I think ich bin might be used to respond to someone asking "who is Lukas?"
It might be more idiomatic, but I have heard many times:
Wer bist du?
and the reply was:
Ich bin ...
I thought that names should always use heiße instead of bin