Unlike traditional Bitcoin transactions that send Bitcoin over the Bitcoin blockchain and use the Bitcoin wallet, Lightning transactions can be sent via a Lightning Invoice or via a Lightning Address.
A Lightning Invoice typically is a long string of symbols typically starting with ''lnbc'', is valid for 24 hours (depending on the service used) and can only be used once.
Example of a Lightning Invoice:
lightning:lnbc100u1pj7wdwtpp5evnkp74we9zhdjze3cnde7lhr44jwrkxklad3c0t8v5p
spmejw8sdp8fe5kxetgv9eksgzyv4cx7umfwssyjmnkda5kxegcqzysxqr8pqsp5r0hpm
03kj4gl9pethkl7vxnlcp0e74kpyzagz7grrdun74g7v8ts9qyyssq49grgjqvy620e4t022g
j44xgpg8qv5lmrndy29n3utmh5cgzp40xhk54lcdvmmkqyfccplxtmts50tjmckaek0d6
c0y90gj8wm4vxnspuue9gy
A Lightning Address is an email-like address that can be used to send transactions indefinitely.
Example of a Lightning Address:
bargain_cool@ln.nicehash.com