[Greenbuilding] lighting

[Bruno M.]

I agree Alan,
and another aspect is also important,
you don't just need light so the people can see the plants but
you want to mimic the sun for the plants, so they can grow;
therefor you need a (mix of) specific light ' color' or wavelengths,
if you get a T 5 with the good light spectrum for plant growth,
and you dim it let say 50%, whats really left then ?
50% of the energy consumption/hour, yes, but has it still 50% of lumen 
output?
And has it still the good color temperature / usefull wavelenghts ? (i 
doubt it)
Therefor it looks better to switch on & off what you need during the day
( probably depending on natural solar light influx.

And to for-come the need to install more fixtures ( more $ to work & 
material)
instead of 5 x 100W with dimmers you may choose 2 x 250W +3 x 50W
or such a combination.

I don't know the latest on LEDS, can you have 'm with the right 
colortemp to server as grow light,
apears as some kind of white to people and with enough lumen?
I found some info but most people don't want to sit in red or other 
colored light:
www.ledgrowlights.info/LED-light-wavelengths.php


A rhetoric question for that client : Is it really green to install 
plants in a cellar or other dark interior,
and then waste ( ecological) expensive electric energy to keep them alive ?

Grts
Bruno M.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Op 20-3-2012 22:22, Alan Abrams schreef:
> the latter--based on the assumption that dimmers consume some 
> measurable current...
>
>
> On Tue, Mar 20, 2012 at 5:17 PM, Gennaro Brooks-Church - Eco Brooklyn 
> <info at ecobrooklyn.com <mailto:info at ecobrooklyn.com>> wrote:
>
>     RE: mo' fishunt, too, lumen for lumen, one would expect...
>
>     Which one is more efficient? The dimming setup or the separate
>     fixture/switch setup?
>
>     Gennaro Brooks-Church
>     ---------------------------------------------------------------------
>
>     On Tue, Mar 20, 2012 at 4:50 PM, Alan Abrams
>     <alan at abramsdesignbuild.com <mailto:alan at abramsdesignbuild.com>>
>     wrote:
>
>         mo' fishunt, too, lumen for lumen, one would expect...
>
>         *Alan Abrams**
>         Abrams Design Build LLC*
>         /A sustainable approach to beautiful space/
>
>         6411 Orchard Avenue Suite 102
>         Takoma Park, MD 20912
>         office 301-270-NET- ZERO (301-270-6380 <tel:%28301-270-6380>)
>         fax 301-270-1466 <tel:301-270-1466>
>         cell 202-437-8583 <tel:202-437-8583>
>         alan at abramsdesignbuild.com <mailto:alan at abramsdesignbuild.com>
>         www.abramsdesignbuild.com <http://www.abramsdesignbuild.com/>
>
>         ----------------------------------------------------------------
>         On Tue, Mar 20, 2012 at 4:45 PM, Gennaro Brooks-Church - Eco
>         Brooklyn <info at ecobrooklyn.com <mailto:info at ecobrooklyn.com>>
>         wrote:
>
>             That is a good idea. I think that once you factor in the
>             extra material and labor it would be the same cost though.
>
>
>             On Tue, Mar 20, 2012 at 4:38 PM, Vadurro, Rob, EMNRD
>             <rob.vadurro at state.nm.us <mailto:rob.vadurro at state.nm.us>>
>             wrote:
>
>                 Many times the need for dimmable is really two or
>                 maybe three light levels. Perhaps you could install a
>                 low light level fixture arraignment and a bright one
>                 alongside it of LEDs or T5s on separate switches.
>
>                 Rob Vadurro AIA, LEED AP
>
>                 **Brooks-Church - Eco Brooklyn
>                 *Sent:* Tuesday, March 20, 2012 2:19 PM
>                 *To:* listserv Green Building new
>                 *Subject:* [Greenbuilding] lighting
>
>                 Hello,
>
>                 My company is building an interior living wall in a
>                 low light area.
>
>                 I need to light the span - about 40 feet long - and
>                 they need to be dimmable.
>
>                 I'm having a hard time finding affordable T5 dimmable
>                 lights. They are about $135 each.
>
>                 I can't find LED that meet the criteria.
>
>                 Any suggestions?
>
>                 Gennaro Brooks-Church
>
> ======================================================
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