Listen to song for strumming pattern.
Intro and verses:
-1-5-6-10-5-6-3-|
-1-5-6-10-5-6-3-|
-2-5-7-10-5-7-3-|
-3-7-8-12-7-8-5-|
-3-7-8-12-7-8-5-|
-1-5-6-10-5-6-3-|
Before chorus:
Starts off just striking the lower strings, then opening out to the whole chord:
-----------3-|
-3333------3-|
------3333-3-|
-----------5-|
-----------5-|
-----------3-|
Chorus:
[ Tab from: https://www.guitartabs.cc/tabs/i/interpol/lighthouse_tab_ver_2.html ]
-3-5-6-10-|
-3-5-6-10-|
-3-5-7-10-|
-5-7-8-12-|
-5-7-8-12-|
-3-5-6-10-|
Outro:
Usual strumming pattern
-3-5-6-|
-3-5-6-|
-2-5-7-|
-3-7-8-|
-3-7-8-|
-1-5-6-|
Then more quickly
-10s5-6s3-|
-10s5-6s3-|
-10s5-7s3-|
-12s7-8s5-|
-12s7-8s5-|
-10s5-6s3-| x2
-3----------------------------|
-3----------------------------|
-3----------------------------|
-5--Then----5----2-3---3----3-|
-5--------5----3-----5----5---|
-3----------------------------| Repeat until end of song