RE: Re: 100 watt light bulbs

["Neil Ball" <neilball@xxxxxxxxxxxxxxx>]

Have you not tried halogen GLS lamps yet? These uses a halogen lamp
within
the normal GLS body so use less energy while remaining fully dimmable and
with great light quality. Philips and Osram have ranges available and while
these are not as efficient as CFLs (they typically save 30% compared to
standard GLS) they do provide all of the benefits of incandescent while
saving a reasonable amount of energy at the same time and having longer
lam=
p
life. You can even get candle lamps from Osram which run at 28W to replace
40W incandescent candles. Prices are not too bad at around =A31.50 per lamp
for the 60/100W replacements.

=20

For those with MR16 lamps you can change to Philips Masterline ES or
simila=
r
which are a range of high-efficiency halogen lamps that again reduce the
energy used by 30% compared with standard halogens and remain fully
dimmable. The only downside of these high efficiency lamps is that there is
not an aluminium coated version for use in fire-rated fittings although I
guess there is no reason why they should not appear in time.=20

=20

There are also high efficiency GU10 lamps from Osram (Halopar) that save
20=
%
compared to standard GU10 lamps.

=20

So there are options for those wanting to save energy but keep the quality
of light and full dimming capability they have experienced with GLS and
standard halogen fittings.

=20

Neil B.

=20

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Kevin Hawkins
Sent: 19 August 2009 10:52
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Re: 100 watt light bulbs

=20

=20=20

I'm the first to agree that old incandesent is inefficient however we=20
need a transition replacement that provides the same role, and I have=20
yet to find it.. Something that physically looks ok, has same=20
brightness/colour temperature output, similar angles of radiation, come=20
on instantly without a warm up period and most importantly can be dimmed=20
in the same way, retrofittable to existing control.=20

Last couple of years has seen good progress in some of these aspects but=20
AFAIK the dimmability is still a problem. A solution advocating 'yes=20
they are dimmable but you must have had them on for a few minutes at=20
full brightness first and you must dim downwards' - oh and you can't go=20
below 30% isn't acceptable and seems like a retro nod to X10 ! The=20
cospmetics are simply not approriate in some fittings eg chandeliers=20
either. As Mal says heat output from incandescents is not wasted=20
either and might have to be supplemented from elsewhere. Not so useful=20
in Aus but always welcome here. But needless inefficency and wastage is=20
obviously a bad thing

As soon as I'm offered such a replacement I'm happy to adopt and change=20
my control if needed. I do agree that PWM is likley to be the way=20
forward for LED brightness control, albeit that is simply waveform=20
chopping similar to current dimmers but using a square waveform and=20
variable frequency, and is not a simple retrofit either. Square edge=20
high current waveforms have RFI issues too.

I've used 100W in a lot of places I used 60 W but at a dimmed=20
brightness and my bulb life has been amazing. However the lower=20
efficieny of dimmers cf relays or full on dimmers is likely considerable

So many technology advances nowadays seem to be advocating improvement=20
but impacting performance eg DAB radio, digital television, low bitrate=20
audio compression etc

K

PS Some of these look nice (in Aus)
http://brightgreen.net.au/products_features.php

Ian Lowe wrote:
> --- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
, "Peter
and Jane" <pandj.munnoch@...> wrote:
>=20
>> Ian
>> Are they dimmable?
>> Rgds
>> Peter
>>=20
>
> Peter
> Yes.
> Rgds
> Ian
>
>
>
> If you mean, 'are they dimmable using the same crappy voltage chopping
dimmers that you use with incandescent bulbs', then the answer is still
yes=
,
just not as well.
>
> Clearly, a system which slices the 240V AC into thin chunks really
quickl=
y
to vary the power delivered is as old fashioned as heating a bit of wire
until it glows. When LED lighting (or the next big thing again) takes off
properly, we'll be dimming on the low voltage side, or using some inherent
property of the material to do it.
>
> Personally though, I don't use dimmers. I hate the bloody things - not
least of all because of the insistence of some folks (which included my
grandparents) to sit in near darkness rather a nicely lit room.
>
> I get the light level I want (which is a very pleasant mix of point
and
room effects) with a mix of small lamps and large floor standers. My PC
roo=
m
has 5 lights - 11W CFLs in the 2 floor standers, 7W CFL in the splash
light=
s
behind the monitors, and a 1.1W rated Blue LED strip under the desk for
effect. It looks gorgeous.
>
> the sooner we ditch incandescents and move on to new technologies (and
yes, new dimmer technologies as well) the better.
>
> I.
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>=20





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