I don't know if there is a difference between the ELM530W (CFL) and the regular ELM530W but as the regular ELM530W was not available from Revain I have I took him a chance and tried it out. The one I received worked great with the PAR light. I found it tedious to install. It has tiny feathers that you attach somewhere in a jar. The Elco lenses also have quirks on the sides that match the Halo and Juno embellishments with springy wire clips (don't know what you call them). I find them much easier to install.
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