> For the complete documentation index, see [llms.txt](https://docs.ladybug.tools/hb-radiance-primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ladybug.tools/hb-radiance-primer/components/2_lightsources/luminaire.md).

# Luminaire

![](/files/3RBc4MfQnIeIdOQcv2kV)

![](/files/4QVAOxzjTHcFUhFdm7EC) - [\[source code\]](https://github.com/ladybug-tools/honeybee-grasshopper-radiance/blob/master/honeybee_grasshopper_radiance/src//HB%20Luminaire.py)

Create a Honeybee Luminaire.

The Luminaire object stores the photometric data of a light fixture and provides methods to: - Parse IES LM-63 photometric data - Generate Radiance geometry via ies2rad - Generate photometric web geometry - Place and orient luminaire instances in space via a LuminaireZone

The Luminaire must be added to the Honeybee Model. The translation through ies2rad happens in the recipe.

### Inputs

* **ies \[Required]**

Path to an IES LM-63 photometric file or a string of the file contents.

* **name**

Optional name of the luminaire. If None the IES file is used as the luminaire name. If the Honeybee Model includes multiple luminaires, each luminaire must have an unique name.

* **luminaire\_zone \[Required]**

A Honeybee LuminaireZone. The LuminaireZone specifices the location and rotation of the luminaire instances.

* **custom\_lamp**

A Honeybee CustomLamp. This can be used to specify custom chromaticity, color or color temperature.

* **loss\_fac**

A scalar multiplier applied to account for lamp lumen depreciation, dirt depreciation, or other system losses. Must be greater than 0 (default: 1).

* **cand\_mult**

Additional scalar multiplier applied to candela values after parsing the IES file. Must be greater than 0 (default: 1).

### Outputs

* **report**

Reports, errors, warnings, etc.

* **luminaire**

A Honeybee Luminaire that can be used in a recipe.


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