On Friday, 1 March 2019 19:35:02 UTC, Dave Plowman (News) wrote:
In article ,
whisky-dave wrote:
On Friday, 1 March 2019 14:31:48 UTC, Dave Plowman (News) wrote:
In article ,
Brian Gaff wrote:
Could one ask why you would want to these days, assuming you could find
any to install!

Is it that far behind LEDs etc in terms of efficiency/life?

I've heard they are, but not having testd them myself I can't say.


A florry gives a more even illumination than a series of LEDs.

That's not really true espeacily over time, the ends of florrys go black
and start to flicker and get dimmer with time.

With old fashioned ballasts, possibly. But high frequency ones have been
around for many years now. The light output does go down slightly with
age, though.

All I know is the lighting was replaced in the mid 90s. with new florries.
All teh electrics of the lab were redone.




Also a better selection of colour temperature, etc.

Not sure that is true, but it should be difficult for LED tubes to be desined like the phillips hues.

Many might prefer to have the colour temperature they want from the off
without messing about.

And far more don;t get the choice we haven't the choice.
When the florries go dim or start flashing we call maintaince (we wait until a few are on the blink) and within the month they come over and change them.



We have new LED tubes in our new lab auto on and off, in my office they
are also dimmable unlike the florrys in my present office, one of which
is just flickering. One in the corridor is flickering and making a
noise. It could wake the students up ;-)

Dimming florries with electronic ballasts has also been around for many a
year. The ones lighting my kitchen worktops - installed some 20 years ago.

But we didn't have them installed here, I doubt we considered we had a need for dimmable, I didn't think we needed them, but it;s not like we were asked.
All we wanted was better lighting than the 1980s lighting we had.