I am looking at lighting options for the 37 gallon reef tank i will soon set up, and have come across the marineland double bright LED fixture. I was just wanting to know how 1 1w LED copares to t5s or MH lighting, cause I dont get how to rate a fixture by lumens. I also need to know what corals, if any, i could keep with this fixture (the 24"-36" one), or other cheap, good lighting options for a 37 gallon aquarium. thanks alot in advance for any help!