Hey all,

I’m looking for a magnetic ballast that will fit my single lamp F24T12 strip light, and the universal 539-SL fits. The issue is that it’s only listed to run F48T12 lamps and I was wondering if it would be fine to run a F24 on it.

I would not advise running a singe lamp on a  single lamp  F48T12 slimeline ballast.   

 I find it best to use a preheat ballaat and FA2 starter parallel  with the lamp.  Even though lamp cant be preheated it will take
A bit to start up.

 Option two is Instant start F32T8 two lamp
Ballast with both output tied together
   Since it have provision to run F17T8 .


 But  for F48T12 your better off running two F24T12 in series on single lamp ballast F48T12

 The Advance SM-140-S-TP, which I believe is the Advance version of the Universal 539-SL, is listed as operating
F40T12/IS, F40T17/IS, F48T12, F42T12, F36T12, and F24T12. There are several SM-140-S-TP ballasts on eBay but kind of pricey.

I currently have a 3 lamp F32T8 ballast in the fixture with 2 of the wires being used for the F24T12, I just want something that is magnetic. Unfortunately for me however the channel won't fit a standard sized slimline ballast and will only take something as big as a standard F40T12 rapid start ballast. The 539 would fit I just do not know if it would run right with a 2 foot lamp.