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Sci.Electronics.Basics -> Low Voltage lighting vs A.C.

There are 24 messages in this thread.
You are currently looking at messages 20 to 24.






Author: Phil Allison
Date: 09:17 15-06-07



"Jasen" <jasen@free.net.nz

>>
>> ** Not the comparison that was asked about.
>>
>
> not the message I was respondinfg to.


** Then inform us - sheep fucker .

Bet like any other context snipper - you cannot.



... Phil




Author: Ross Herbert
Date: 03:27 17-06-07

On Fri, 15 Jun 2007 07:58:22 GMT, Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote:

>
>
>Ross Herbert wrote:
>
>> On Wed, 13 Jun 2007 07:44:23 -0400, "David B." <dbeau@glis.net>
wrote:
>>
>> >I want to do some landscape lighting and wondering if using a
12volt
>> >system(20 watt bulb) is more efficient than normal 120 volt (20
watt
>> >Bulb).
>>
>> It is much safer to use 12V for domestic outdoor lighting.
>
>Just a thought.
>
>Why not 24V ?
>
>Graham


Well, for that matter, why not 32V? This used to be a common domestic
supply voltage for farming properties up till about the 1960's.

I suppose 12V is more common and it is easier to find garden/outdoor
lamp fittings for this voltage than it is to find 24V or any other
voltage.

Author: Joel Kolstad
Date: 20:03 19-06-07

"Ross Herbert" <rherber1@bigpond.net.au> wrote in message
news:aco973pje4fpig4vl97udvok4gf8oklbsv@4ax.com...
> I suppose 12V is more common and it is easier to find garden/outdoor
> lamp fittings for this voltage than it is to find 24V or any other
> voltage.

I always figured the low-voltage outdoor lighting companies may very well have
started by using automobile bulbs -- 12V -- and hence its just stuck around
even as the companies have become bigger. 28V or 32V would seem to be a
significant improvement while still being much safer than 120V or 240V.



Author: Ross Herbert
Date: 04:53 20-06-07

On Tue, 19 Jun 2007 17:03:28 -0700, "Joel Kolstad"
<JKolstad71HatesSpam@yahoo.com> wrote:

>"Ross Herbert" <rherber1@bigpond.net.au> wrote in message
>news:aco973pje4fpig4vl97udvok4gf8oklbsv@4ax.com...
>> I suppose 12V is more common and it is easier to find
garden/outdoor
>> lamp fittings for this voltage than it is to find 24V or any other
>> voltage.
>
>I always figured the low-voltage outdoor lighting companies may very
well have
>started by using automobile bulbs -- 12V -- and hence its just stuck
around
>even as the companies have become bigger. 28V or 32V would seem to
be a
>significant improvement while still being much safer than 120V or
240V.
>

In practical terms, unless you have extra long cable runs, 12V does
quite nicely and is economical to install. Commercial buildings go for
high voltage outddoor light fittings but they can justify the
expenditure in heavy duty fittings and underground cabling in conduit.
12V can be run direct in ground.

1 2


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