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Re: [EnergyPlus_Support] Re: lux and watts
- To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
- Subject: Re: [EnergyPlus_Support] Re: lux and watts
- From: "rahula7@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
- Date: 19 Jun 2014 10:03:43 -0700
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There is no need for a lumen/watt ratio for energy modeling. The lighting power input into the lights object is assumed to be sufficient to provide the target illuminance because all the lights would need to be on at night. Thus, when light output = 1 (daylight contribution = 0), the lighting power is also equal to 1. If you use continuous dimming, the min input power fraction and min light output fraction fields will define the relationship between light output and lighting power. If you use stepped dimming, then the number of control steps will determine the lighting power.
Rahul
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Posted by: rahula7@xxxxxxxxx
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