It is amazing how much RF noise those CFL and LED lights put off.
I witnessed an RF noise "sniff" last week on a job site. The ceiling florescent and the CFL's in the desk lamps in the office were extremely noisy. While that noise was up above the audible range, in one location in the building the sniffer picked up the sub harmonic of 1/2 the operating frequency our antennas were looking for.... I know the sub harmonics are much weaker generally than the higher order harmonics but they are there none the less...and in this case.... that would have placed the harmonics in the audio range just a few halvings down from the prime frequency. We operate centered on 66khz ..half that is 33khz ...half that is 16.5khz and that is in the audible range for most people except old musicians.
It was also of interest to note that the noise picked up by the sniffer was fairly localized. Most of the noise sources required the antenna on the sniffer to be within 3 to 4 feet to hear it above the ambient noise floor.
So if you have a malfunctioning CFL ballast, it is very possible to get audible sub harmonics on the power line and radiating into the air waiting to be picked up by unshielded and defective cabling.....
All that aside...... I use CFL's in my studio without problems. The lamp is 3' or more from the gear and cables.