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[EnergyPlus_Support] Re: Variables to measure the Zone lux level

Hello Andre,

So, I have a building I'm working on that uses solatube's for extra 
lighting during the daytime.  So as the solatubes collect more 
lighting from the sun, the lighting power from the existing lighting 
in the building will ramp down (put out less wattage).
So here's a sample of my data.  Column 1 is output variable "Daylight 
Illum at Ref Point" and Column 2 is "Ltg Power Multiplier from 
Daylighting".  So its a decimal form of the percentage of lighting 
the building requires to satisfy your setpoints.  So as the lux 
increases, lighting power from building is reduced.
37 lux = 5% reduction
385 lux = 53% reduction

Column 1 [lux]         Column 2 [unitless]
37.11481104	       0.955515326
188.5679641	       0.757688626
385.411255	       0.469558702
299.9273695	       0.60845007
186.3168134	       0.764873899
264.0468125	       0.657083824
323.9869944	       0.652336076
196.7505115	       0.766595286
111.9851288	       0.853581824
9.795133401	       0.987605888

So I hope that answers your question on the "Ltg Power Multiplier 
from Daylighting" output variable.  And I didn't have any luck 
finding an output variable that could tell you the lux (both 
generated by lighting and daylighting) in an area for all time.

Good luck
Morgan


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, André Lopes 
<andr_lopes2000@...> wrote:
>
> Hi all
> 
> Can you you tell what are the correct variables to measure a 
zone lux level (during day and night).
> 
> What is meaning of this variable: Ltg Power Multiplier from 
Daylighting
>  
> I read the Manual, but I did not understand it.
>  
> Regards
>  
> A L
>



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