Here we show the results of 3 typical compact fluorescent (CFL) bulbs and our main three types of LED - both earthed and not-earthed (you can't earth CFLs). The units are arbitrary, but are the same in each graph. 1000 approximates to 100 volts per metre. All the measurements were made at approximately 0.4 metres from the bulb (about 16 inches). The background line represents quiet background levels in a rural area with the lights turned off. The frequency scale is 10 to 490 kHz.