Can LED's burn a Mag????

[Mad Marine]

Hi,

A recently placed my Mag underneath my LED hydra 26 HD because it was hanging vert near my overflow. He's stayed there and seems happy (didn't walk and feeding) but I noticed on one side the tentacles are white and slightly shrivelled. Is this dud to too much light? I wouldn't think so as these guys love light! Is it a case of too much too soon? Vid below

https://vimeo.com/205794597

Thanks MM