Xenia closing up at night- is this normal?

[jhruppel]

My Xenia is closing up at night, usually an hour before my light turns off. Is this normal, or is something causing this?

[peregrinus]

my silver tip and enlongta(SP?) do this about an hour before the lights go out but my pom pom are open all the time. i beleave it normal altho xeina is different for different people.

[clord]

Its normal

[TippyToeX]

Normal. Many corals close up at night. :)

[whiteshark]

ditto, its normal.