RE: GBlist: 12volt systems

[Kerryn Wilmot <kerrynw@mel.spowers.com.au>]

Sacie,

12V systems are energy inefficient.  Witness the heat output from them.
You need to allow enough space behind them for heat dissipation and
space not too far away for the transformer.  You must make sure they are
not covered by insulation which would trap the heat.  I find that the
lighting suppliers will give me the criteria for each light fitting
selected - transformer alternatives, suitable wiring distances etc.

If you link multiple fittings to a transformer you need to replace all
the lamps when one blows out.  This is because the blown globe puts
stress on the others and reduces their life considerably, i.e. probably
need replacing within a couple of weeks.

I would not recommend 12V systems to anyone concerned about energy
efficiency.

Kerryn Wilmot
Project Architect
Spowers
Melbourne, Australia

> -----Original Message-----
> From:	Sacie H Lambertson [SMTP:dlambert@grasshoppernet.com]
> Sent:	Wednesday, January 31, 2001 3:23 AM
> To:	greenbuilding@crest.org
> Subject:	GBlist: 12volt systems
> 
> Forum,
> 	In the process of educating myself about 12volt lighting
> systems.  Would
> like to use them for residential interior as alternative to
> much-preferred
> compact fluorescent fixtures ...<cut>...
> 
>  Sacie Lambertson
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