Maxima under T-5

Well that says it. I want to put a Maxima in the tank but I know with that lighting that a bottom placement is pretty much out of the question I would think. So what about a mid or upper. I feel very confident that placing it at the top would be fine and I have a place in mind. However I also have a mid to lower nook that would be great but I worry that the lighting would not be strong enough. I have 4 T-5s that are running at 84 watts each on a 90 gal system. The tank is 24" deep.Thats 3.7 watts per gallon. I know Par is the ultimate guage but I dont have the par rating sorry. I currently have a Derasa sitting on the bottom and it has been doing great. 

Its a retro fit. I have the Icecap ballast. 

No thoughts?

Thats what I thought. I feel it would be fine at the top. Just wondered about the mid? Trying to read up on all the different ones. I am fast becoming a big fan of clams.

Do you have any good links for information on them? Im googling away.

Ok so I found this link. I removed the link. I think there are links within the link that may be an issue. If you want the link I can send it to you. It looks to have a lot of great information and also suggest a couple of books. Let me know what you think. You may have some better sources or insight. I did find a lot of information about trace element needs as well. Check out the part of reproduction. I remember your clam that got sick and was wondering if there were in similarities to things that trigger spawning? 

Yeah, thought about that while I was reading the link I found. There was a lot of information in there about breeding clams. I may do that at some point but I find that people with better understanding can help better when you ask better questions.