Ray they are the same ones that I have in my tank. I have both of mine submerged and they come in 20 inch tubes. They are VERY bright, and AD carries them in stock. If he doesn't have them, ask him because the last time I was there and bought a second one he had to run and grab one out of storage.
I found a link...
http://www.tropicalfishencounter.com...roducts_id=196
Oh, I cannot completely state that they are submergeable, but I do have mine that way. They come with brackets that have suction cups, so I figured it should be submersible.



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