reefriot Posted July 27, 2012 Share Posted July 27, 2012 So here's my problem. Bought a tank with dual 400 mh and 2x72" vhos on it. Don't want to run the MH as its starting out as a FOWLR tank. The vhos are ok but was thinking of switching over to T5s down the road. The ballast is a PFO EL 2-2. From the limited info I could find(most real old RC posts) its supposed to have 2 workhorse 7 ballast in it. That being said could I rewire it to run T5s. Some say yes and some say no. I was under the impression that T5s can be run off of a PC ballast and workhorse ballast run them. Want a solid answer before buying all the bulbs and endcaps. Quote Link to comment Share on other sites More sharing options...
NoobtoSalt Posted July 27, 2012 Share Posted July 27, 2012 Workhorse 7's will run T5's great! They are rated for up to 220w. I had to swap out an old ballast in a T5 light not that long ago with a workhorse 6. I have a workhorse 7 laying around here still if you need one. Also check out this thread. It sounds like you might have a Workhorse 5 installed not a 7. http://www.wetwebmedia.com/cfmarfaq2.htm Quote Link to comment Share on other sites More sharing options...
reefriot Posted July 27, 2012 Author Share Posted July 27, 2012 Thanks bud. Ill open it up tonite after lights out to confirm. I have used a lot of the workhorse ballast in the past but just got back into this hobby so T5s are new to me. I figured they would be fine as its still a flourescent bulb. Wish they had 72" T5s! Quote Link to comment Share on other sites More sharing options...
NoobtoSalt Posted July 27, 2012 Share Posted July 27, 2012 Yeah the fixture I had was 12 36" bulbs on my 240 gallon build. Quote Link to comment Share on other sites More sharing options...
wanareef Posted July 27, 2012 Share Posted July 27, 2012 If it is the 7, then each red wire will light up to a 55w bulb x4 and the yellow is the return Quote Link to comment Share on other sites More sharing options...
Smann Posted July 27, 2012 Share Posted July 27, 2012 Check out Fulhams site they have the wiring diagrams for the bulb type and quanity you choose http://horse.fulham.com/customer-service/wiring-diagrams/ Quote Link to comment Share on other sites More sharing options...
kriz2fer Posted July 27, 2012 Share Posted July 27, 2012 I ran t5 on a vho ballast with no problems. Quote Link to comment Share on other sites More sharing options...
Harold B Posted July 27, 2012 Share Posted July 27, 2012 Mine has 2 workhorse 5's just remove the 4 outer screws and look. Cover comes right off. Quote Link to comment Share on other sites More sharing options...
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