i have noticed "enhanced" noise when using those economy florescent light
bulbs, those used to replace standard tungsten filamentt bulbs.

they have built in oscillators to drive the flourescent tube gas into exiter
stage. thus, they produce a broad bandwidth of plain old spark type
transmitter radio noise. aka-plain old "static"

tungsten bulbs act as resistors only, and will produce only line frequency
pure sinusoidal 60hz noise, whch IS filterable. it is the purity of the
sinewave emmisions that makes them (tungsten) so desirable.

also, mercury vapor, sodium halide and other ballast driven bulbs that
essentially are controlled electric arcs, (generally high energy plasma
state gaseous type and worse) emit tremendous electromagnetic crap all
around them.

wireless devices will pickup these spurious bandwidth edges produced by
these, usually sloppilly designed foreign made bulbs. (china, hungary, mex,
so amer)

they may save u some electricity , but they sure do pollute / smear the air
with all kinds of noisey electrical/electromagnetic crap!

worse yet, they are often inserted into ungrounded and unprotected sockets,
with little thought of the consequenses.

ungrounded shields will happily absorb any emi and indirectly add/induce it
to the wires encased within, so be careful of your grounds.