Anyone familiar with this light? On dr foster and Smith they are on there. The ones on the site,show 5 rows of LEDs. They are saying thay for a 90g tank, I would need 2 of the fixtures. The fixture I'm looking at has 8 rows in it. Do y'all think that that amount of light would be sufficient for a 90g tank, 48" long? The fixture itself is 24x15"