In article ,
whisky-dave wrote:
On Friday, 1 March 2019 19:35:03 UTC, Dave Plowman (News) wrote:
In article ,
NY wrote:
"whisky-dave" wrote in message
...

Dimmable fluorescent fittings have been around since the early
1960s. Nothing new there.

How are fluorescents dimmed? I'd always thought that it was
impossible, and was surprised when the fluorescents in my school
lecture theatre could be dimmed. They were probably installed in the
early to mid 70s, which gives an idea of what technology was
available then. I remember a huge cabinet about the size of a 6-foot
high freezer in the projection unit which gave off a hell of a hum
as the lights were going from full off to full on, which they did on
a timer: the lecturer pressed a button and they dimmed/brightened
automatically over the course of about 5 seconds.

With the electronic ballasts I have here, all you need to add is a
simple pot to dim them.

Good for yuo all we have is 2 panels with 8 rocker switches on each to
control the lights, not sure I could have replaced those 'rockers' with
16 pots just like that.

I'm quite sure you couldn't. But this is a DIY group, so many obviously
can.

--
*A plateau is a high form of flattery*

Dave Plowman London SW
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