suspend my lights or not???

My tank is 55 gal 36 x 24 x 18.

My lights are all in one fixture, which fits perfectly over the tank.

I have no feet for the fixture, so right now I would have to just set it directly on the tank or hang it. I dont wanna set it on the tank really....seems too risky for a potential hazard. If I could find feet for it that would be great. I would think heat would be an issue if I placed it directly on the tank, not to mention lack of oxygen. I ordered a suspension kit on ebay already.

Any pro's and con's as far as accessibility to working inside the tank and/or feeding with either having feet or hanging the light fixture. Seems like it might be a pain to have to remove and replace the fixture constantly, however, on the flip side, if I hang it, it might be in the way. Any feedback would be appreciated.

 

my fixture also has built in fans as well.