RE: Re: dimmable CFL

["Neil Ball" <neilball@xxxxxxxxxxxxxxx>]

Yes, the type designed for leading edge dimmers offer full dimming
control
according the datasheet with a completely separate model to do the switched
dimming. There is also a ballast for traditional linear tube fluorescents
that again allows dimming using standard live/neutral connection thereby
avoiding the need for separate control cable in addition to the mains. What
is unique is that the ballast design allows the lamp to be switched on at
any light level, most 1-10v dimmable ballasts I've used in the past come on
at full brightness and then dim down which somehow feels wrong in a scene
setting control system.



I'm sure there will be a few people on list who will have tried them soon
and report their findings.



Neil B.



_____

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
wywywywywywywywywywy
Sent: 03 October 2007 08:31
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: dimmable CFL



Hi,

Yes I am aware there are two kinds. But the Megaman one also claims to
work with a normal dimmer switch, but in reality you need to flick the
dimmer switch off and on. Notice that although the Varilight one says
it will work with a normal dimmer switch, it doesn't say it will work
in a traditional dimmer switch way.

I am just being paranoid may be.

And I totally agree with your LED statement. In the US there are
already dimmable LED spotlight kits, but quite expensive at the moment
(IIRC $60 for a bulb then $120 for the controller). No doubt it will
be even more expensive when it gets here. That is until the Chinese
manufacturers start to mass-produce them! :D

Thanks,
Wayne

--- In ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com, "Neil
Ball" <neilball@...> wrote:
>
> There are 2 versions of the Varilight unit, 1 that is dimmable with
> conventional leading edge dimmers and another that does the staged
dimming
> by flicking the switch which I am sure will soon will not have much of
a
> future if the 1st type works well.
>
>
>
> I expect that LEDs will solve the GU10 issue in time, manufacturers
are
> making significant steps forward in this area in relatively small time
> scales.
>
>
>
> Neil B.
>
>
>
>
>
> _____
>
> From: ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com
[mailto:ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com] On
Behalf Of
> wywywywywywywywywywy
> Sent: 02 October 2007 16:49
> To: ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com
> Subject: [ukha_d] Re: dimmable CFL
>
>
>
> Hi,
>
> I have also been waiting for these since about 6 months ago.
> And since last week they are finally available :D
>
> But do they REALLY work with a normal dimmer switch (and hence HA
> systems) though?
>
> Because the Megaman one claims that it does, but in reality you have
> to flick it off and on, which isn't very good on a HA system. So I am
> hoping the Varilight one is not like the Megaman one.
>
> And I am not sure how long it will take to warm up either.
>
> Kinda wish they would bring out a GU10 version though! As 12 of them
> in the living room really do consume a lot of energy...
>
> Thanks,
> Wayne
>
> --- In ukha_d@yahoogroups. <mailto:ukha_d%40yahoogroups.com>
com, Chris
> Hunter <cjhunter@> wrote:
> >
> > great, thanks ... see they also do (are thinking about doing)
> > something for standard linear fluorescent's ... which might suit
us
> > even better ...
> >
> > Chris
> >
> >
> >
> > On 1 Oct 2007, at 10:56, jamie_whitehorn wrote:
> >
> > >
> > > These lights are made by Varilight and come in two forms.
The
version
> > > you've pointed at works form a normal switch and would, I
think, be
> > > difficult to use with an HA system. The other version can be
used
> > > with a
> > > standard dimmer (http://tinyurl. <http://tinyurl.
<http://tinyurl.com/yt7vr2>
com/yt7vr2>
com/yt7vr2
> <http://tinyurl.
<http://tinyurl. <http://tinyurl.com/yt7vr2>
com/yt7vr2>
com/yt7vr2>
> > > ), and might be easier to use with an HA system just by
using a
normal
> > > dimmer component (eg Idratek SLD).
> > >
> > > The switch dimmable ones have been available for a while.
The
dimmable
> > > ones were supposed to be available in May and slipped and
slipped and
> > > slipped their shipping date. This doesn't really surprise me
as
> > > making a
> > > flourescent light dimmable from a normal dimmer switch is a
bit of a
> > > technical challenge - normal dimmable flourescents require a
240v feed
> > > for the heaters. I've had one on order since May and they've
finally
> > > said they are shipping them. I've also been talking to Karam
at
> > > Idratek
> > > about these and they've also got one on order to test with
an
SLD, so
> > > I'm waiting for the thumbs up before plugging into the home
Idratek
> > > system (apparently if they don't work in a standard way
there is a
> > > possiblity that it could have unexpected results on the
SLD). As
> > > soon as
> > > I get any feed back I'll post an update.
> > >
> > > HTH, Jamie
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>





[Non-text portions of this message have been removed]