Is 2 HOB Refugium too much weight...?

[bimm3rb0y]

I have a CPR HOB Refugium that is 14.75” x 4.12” x 16.00” for a 55 Gallon tank. I'm thinking of getting another one for the other side. Will this be too much weight for my glass tank or should I be ok?

 

[aquaknight]

Those might be exterior dimensions, but either way each fuge is about 4.2 gallons.
So;
(4.2 x 2) x 8.556 (the weight of saltwater) = 71.84lbs
A bit of weight, but as long as the fuges are properly shimmed so that most of the weight is carried down through the glass to your stand, your fine. If the fuges just sort of 'hang' and pull at the top of the glass pane and pull at the seams, I'd be a bit concerned.
Glass actually has a surprising high tensile strength.

 

[bimm3rb0y]

Yeah the fuge is pretty much flush behind the tank against the wall. I'm also wondering about lighting. Would just a normal clamping desk lamp work for the plants in the fuge to grow or will I need to buy the lighting for the fuge specifically for it?