When I decided to go MH, I ordered a retro kit. I put in 1 - 175watt 12000K along with 2 NO 15watt 18" 18000K flourescents.
These sit over a 55 gallon reef tank. 2 bubble corals, 1 meat coral, assorted shrooms, feather dusters, coral banded shrimp, green brittle star, red hermits, turbo snails, yellow cucumber, emerald crab, yellow ball sponges, and assorted critters that came on the live rock.
Why did I go with this? Just personal preference.
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)