Hi, i have a question related to the new bitcoin lightning network Protokoll and hope someone can help me to understand the following think:
I read everywhere that the bitcoin lightning network will be the game changer for the Bitcoin Blockchain because it will made transaction faster and
the Network do not need as much mining power as it need currently but i do not understand why.

If i'm right or understand it correctly the lightning network will bring the posibility to perform transactions in a privat chanel. So everything happening in this chanel will be fast and instand so
if i buy my coffee i can pay it and this transaction will be done very fast. But at the and when the transation is done and the chanell closed, it will be send to the bitcoin blockchain and here it have to be mined again
in the same way as we do it now (only a few transactions per minut).
So how the lightning network solve the currently problems bitcoin have in the bitcoin blockchain?

Thanks for explanation
Best Regards
Chris