Hythloth Valve Room Solution

Sequence: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8

This sequence will turn on all the lights in the room and open both portculli.

Eidolon found another method, treating each portcullis as a separate puzzle.

1 - 2 - 6 - 7  Opens the one at the upper right

3 - 4 - 5 - 8  Opens the one on the left