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I am replacing a bathroom "quad tube" fluorescent recessed ceiling fixture with a Halo recessed downlight LED "module" (RL560WH6940R). This module is the kind that comes with a male edison screw mount so all you have to do is take out the old build and screw the module in:

Halo recessed downlight LED

Here is a picture of the old quad fluorescent bulb:

Quad fluorescent bulb

The fluorescent bulb fits into a reflector housing shown here:

reflector housing

This reflector trim has metal springs on the side that allowed me to remove it from the recessed housing in the ceiling. I cut off the white and black wires from this reflector trim leaving the black and white wires. I then wired in a female edison screw mount piece that allows me to attach the Halo retrofit LED module.

However, I cannot get the Halo LED module to work in the bathroom fixture. I know the LED module works because when I screw it into my desklamp it lights up perfectly.

Also, I have screwed in two other LED bulbs (a 9W Sylvania and a 15W GE PAR30) into the bathroom fixture, and those light up.

Why doesn't the combination of the Halo LED module with the bathroom fixture work?

UPDATE: It appears that the ballast for the original quad fluorescent bulb is above the housing and not visible. I would have to take out the housing to remove the ballast. To remove the housing would be difficult (it is probably attached to a beam). However, I found that the Feit LED modules (1200274) work even with the ballast.

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    I don't quite follow how that compact fluorescent lamp works with an Edison socket. There must be a ballast+adapter involved, and you're removing both that and the CFL tube in order to test the Sylvania, GE, and Halo units? Also, what kind of control are you working with: a simple toggle switch, or a dimmer/timer/smart switch of some kind? – Greg Hill Dec 28 '18 at 22:06
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    Yes, how is the ballast mounted into your fixture? – ThreePhaseEel Dec 28 '18 at 22:16
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    How on earth are you getting the Edison base to screw into a CFL socket? – Harper - Reinstate Monica Dec 28 '18 at 23:57
  • I updated my question to better explain how I am attaching the retrofit LED module. – rlandster Dec 29 '18 at 15:37
  • Can you post a photo of the inside of the fixture with neither the reflector nor the retrofit module in place? – ThreePhaseEel Dec 29 '18 at 20:02

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