# Deconstruct Lighting

![](https://459479801-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Ma9N5K8lMbAhbyBVgms%2Fuploads%2Fgit-blob-76344f9e134bd5d18894bf6fafd701268702313b%2FDeconstruct_Lighting.png?alt=media)

![](https://459479801-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Ma9N5K8lMbAhbyBVgms%2Fuploads%2Fgit-blob-e11d711dc1c995dc77e850546de5da9aa7b66a37%2FDeconstruct_Lighting.png?alt=media) - [\[source code\]](https://github.com/ladybug-tools/honeybee-grasshopper-energy/blob/master/honeybee_grasshopper_energy/src/HB%20Deconstruct%20Lighting.py)

Deconstruct a Lighting object into its constituient properties.

## Inputs

* **lighting \[Required]**

  A Lighting object to be deconstructed. 

## Outputs

* **name**

  Text string for the lighting display name. 
* **watts\_per\_area**

  A numerical value for the lighting power density in Watts per square meter of floor area. 
* **schedule**

  A fractional for the use of lights over the course of the year. The fractional values will get multiplied by the watts\_per\_area to yield a complete lighting profile. 
* **radiant\_fract**

  A number between 0 and 1 for the fraction of the total lighting load given off as long wave radiant heat. 
* **visible\_fract**

  A number between 0 and 1 for the fraction of the total lighting load given off as short wave visible light. 
* **return\_fract**

  A number between 0 and 1 for the fraction of the total lighting load that goes into the zone return air. 
* **baseline**

  The baseline lighting power density in W/m2 of floor area. This baseline is useful to track how much better the installed lights are in comparison to a standard like ASHRAE 90.1.