Euphyllia closing when light turn on

[ramdero322]

Hi, whats wrong with my euphyllia?
Its open at night and its closing immediately when lights turn on.
Other euphyllias are fine.
Its possible that my euphyllia is still aclimating to new light? I bought that euphyllia 3 weeks ago.
First photo at night
Second photo few minutes after lights turn on
And my lightning is 30w led diy, tank 15g

 

[Lovemyreef2015]

It looks fine in the pictures. The second picture looks like it might be getting ready to excrete waste maybe.