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Lucien Nunes · 19th Nov 2021, 5:38 pm

Metal halide discharge fittings have ballasts and some take linear, double-ended lamps. Your LED might be intended to replace either tungsten or metal halide, hence the possibility of there being a ballast or not.

19th Nov 2021, 5:38 pm	#5
Lucien Nunes Rest in Peace Join Date: Apr 2008 Location: London, UK. Posts: 2,508	Re: Ballast in halogen lamps (sometimes) Metal halide discharge fittings have ballasts and some take linear, double-ended lamps. Your LED might be intended to replace either tungsten or metal halide, hence the possibility of there being a ballast or not.