you won't find such a device for pl/fl light.
to have a dimming feature, the ballast or eballast that you are using must have this feature built in.
else not possible to have dimming feature.
alternative solution, get multiple timers and hook each ballast/eballast to individual timers.
set timing to switch on your pl tubes sequentially with delay.
you'll be able to simulate dawn, dusk and 'regular' overcast.
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