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Radio Interference |
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Do CFLs really interfere with radio
signals? |
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Interference levels
The light bulbs were turned on one metre away
from an AM/FM radio. The volume of the interference was measured when the bulb was off and
after the bulb was turned on. The volume control on the radio
was set at maximum for the tests. The following frequencies
were tested: 530kHz, 800kHz, 1600kHz,
88MHz, 98MHz, 108MHz This page shows the results for each type of bulb and also includes sound
bites so you can hear the interference. Interference Levels Results
Image Examples Of Interference These are images showing relative
volumes of interference CFL interference at 530kHz (low frequency AM)
The same interference is not present with a
Incandescent Lamp (at AM 530kHz)
To listen to the
interference from a CFL and an Incandescent bulb at low AM frequencies, click here. (note: this link may not work on
all browsers/operating systems) (You can
download these sound bites by right clicking on the following links and
pressing Save Target As… downloads may take a while on dial-up) incandescent interference, CFL interference Note: The bulb also
interfered with the radio signal when it was five metres from the aerial, on
low AM frequency. |
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