If "alien eye" is purple with green rims and green eyes (my lfs sells "named" frags without the name mostly), I have had mine on the rock, in a slight overhang so it was mostly lightly shaded.
This was in a rsm 33gal almost at the bottom of the tank with stock lighting (pc's).
This produced awesome color, very little growth, though the frag always looked healthy.
I moved and put the chalice on the sand...a little bit lower but overall more light. The colors are not nearly as stunning, but it looks like a bit more growth (though I would still say a very slow grower).