I have had mixed results with energy saving fluorecent bulbs and fixtures. The ones from the major manufacturers like GE seem to be very quiet, while the ones from cheaper off-shore outfits can be a real mess! All of the GE bulbs I have bought are undetectable on HF. Some of the ceiling fixtures from MaxLite (supplied though my utility's green program)wipe out everything from 15-30 Mhz. The LOA (Lights Of America) bulbs typically fail or blow up in a shower of sparks within 6 months of purchase. After 3 of these units did the same thing, I removed them all and replaced them with other brand units, and haven't experienced a failure since.
Best advice is to buy 1 of the bulbs you are thinking about getting and try it. If it interferes, you can always return it.
For a video demonstration of a good bulb versus a bad bulb, check out this page from my website and click on the last link (picture) at the bottom of the page. BTW, the picture is a screen capture of the audio spectrum coming out of the receiver while the bad bulb is operating. The video shows the effect on the radio.http://www.ka1mda.org/ham/clips/index.htm
73, de Tom, KA1MDAwww.ka1mda.org