[Greenbuilding] Another Lighting Retrofit

[Paul M. Eldridge]

‎Sorry, folks, I will try this one last time and hopefully get it right; appreciate everyone's patience. ‎

‎Hi Alan,

Our local fire code requires a minimum of 50 lux or 5 foot candles be maintained in hallways at all times, so this is something you may wish to investigate further. And with 7 to 9-watt A19 LEDs now producing about as much light as a 60-watt household incandescent, there might not be a whole lot to be gained at the end of the day.

As another point of comparison, a 2-lamp F32T8 wall cube or wrap equipped with two‎ 12-watt InstantFIT T-LEDs powered by a NEMA Premium 0.77 BF ballast draws approximately 23-watts and supplies 2900 lumens, or over125 lumens per watt. That's about as much light as you would derive from two 100-watt incandescents, and the numbers continue to improve with each passing year, e.g., Philips has publicly announced that they expect their InstantFIT T-LEDs to hit the 200 lumen per watt mark in the not too distant future. 

Regards,
Paul

Sent via my BlackBerry Q10 | Ce message envoyé avec mon BlackBerry Q10
 

Hi Paul (or other electrical wizards)-

do you have any experience retrofitting hotel or multifamily corridor
lighting with occupancy sensors? For example, what are the code
limitations--minimum lighting levels when not actuated, hours of operation,
etc...

I've stayed in apartment bldgs in Europe where corridor lights were
completely off, all the time, unless actuated. I am also aware that
California was considering a mandate for dual level systems a few years
ago, with limited hours of operation, but I don't know what became of it.
IIRC, they would have required one lumen per square foot, when not actuated.

-aa

Alan Abrams

*certified professional building designer, AIBDcertified passive house
consultant, PHIUS*
*certified passive house builder, PHIUS*
cell 202-437-8583
alan at abramsdesignbuild.com
HELICON WORKS *Architecture and Education*
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