What is a good moon light?

[psilentchild]

I wanted to put two moon lights on my tank one on each end.I was wondering what are some good one.I was thinking it would be cool if it would change colors.Like red to blue or something like that.Will that bother the fish?I already have two hqi pendant lights on my tank and I was going to add one more and leave the ends with no light.When the day lights go off the moon light come on only lighting up the ends off the tank leaving the middle dark.I have no canopy so I need something you can hide.Here is a picture of the one I was looking at.Is this a good one?Also I will post a picture of my tank.
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=12110

 

[psilentchild]

<a href="http://s204.photobucket.com/albums/bb60/psilentchild/?action=view&current=tank019.jpg" target="_blank"><img src="http://i204.photobucket.com/albums/bb60/psilentchild/tank019.jpg" border="0" alt="Photobucket"></a>

 

[psilentchild]

<a href="http://s204.photobucket.com/albums/bb60/psilentchild/?action=view&current=tank020.jpg" target="_blank"><img src="http://i204.photobucket.com/albums/bb60/psilentchild/tank020.jpg" border="0" alt="Photobucket"></a>

 

[psilentchild]

It dont have to be hiding but just not to bulky

 

[psilentchild]

Nevermind on the changing color.I think that would just stress the fish.