[hultner]

What is the Blockstream's Lightning Network and how does it correlate with bitcoin?

How will bitcoin attract customers from traditional payment options if fees are higher?

[out_of_protocol]

That's level 2 solution, implemented on top of Bitcoin (you need to create bitcoin transactions to start interacting with LN and consequent "good" transactions are almost free).

One thing - it is not actually implemented in full and therefore can not be used in vivo.