
I had a CFL bulb I wanted to test so I needed a 4 pin adapter for a standard Edison screw base (E26/27). After all 5 bulbs didn't work and I found out on my own after some video research that these bulbs are fluorescent (didn't say CFL) so a ballast would be required which is why you can't find adapters at any reputable hardware store. So unless you have an E27 fitting with a wired ballast, this adapter will never work.

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