On 18/12/2020 20:20, Cursitor Doom wrote:
Gentlemen,

Is there some reason why one cannot have flourescent tubes and LED
floodlamps running off a common supply? I have found that when
paralelling up the LED floodlamps with flouro tubes, the tubes no
longer work; don't even try to start-up, despite the fact that have
full mains voltage connected to them. The LEDs OTOH, are totally fine.
Anyone else had this experience?

I would suggest a wiring fault. Have you checked if power is getting to
the Fluorescent fittings?