I can only suggest to you what I recently looked into and decided on for a change of lighting from PCs to MHs for my 120-gallon reef. I didn't know which would be best for the change...more PC (which I already had on there), t5s or MH with actinic support. After exhaustively researching this, I decided that two 250-watt MH with actinic support would be the best choice for me. The only thing that kept me from going ahead was the fear of the heat that a fixture like that would transfer to my tank. I had posted a question and mentioned my concern about heat and someone PM'd this website to me:
www.aquactinics.com
The poster said that he had a fixture from there and there was no heat transfer. The website mentioned that but I was cynical so I took a ride to the factory to see for myself. I was really amazed...there was no heat at all below the bulbs and the unit was cool to the touch. So, I ordered one.
There were people telling me that I should only get double ended bulbs since these come (right now) only with single ended bulbs, but I can tell you that I saw an Aqualine Bushke fixture and a Coralife unit in a fish store that I go to, each with the double ended bulbs, and I put my hand under them and both generated a good deal of heat...frankly, they were hot underneath. I'm convinced that I got the right unit. Just a suggestion.
