Properties

POINT LIGHT

  • Power: Defines the power of the emitter and the available power units (lumens, watts, W/sr, W/nm, W/nm/sr)
  • Efficacy: The energy loss of the power that is converted to visible light
    Maximum efficacy is 683 lm/W which corresponds to lights with no energy loss
    Common light have efficacy between 2 and 50lm/W.
  • Attenuation: Defines the light's attenuation. Available options are: none, inverse and inverse square
  • Temperature (K): Set the color of the light in Kelvin

Point light options Point light example

SPOT LIGHT

  • Power: Defines the power of the emitter and the available power units (lumens, watts, W/sr, W/nm, W/nm/sr)
  • Efficacy: The energy loss of the power that is converted to visible light
    Maximum efficacy is 683 lm/W which corresponds to lights with no energy loss. Common lights have an efficacy value between 2 and 50lm/W.
  • Attenuation: Defines the light's attenuation. Available options are: none, inverse and inverse square
  • Temperature (K): Set the color of the light in Kelvin
  • Hot spot: The angle at the tip of the cone, where light is emitted at full intensity
  • Fall off: The angle at which the light fades away

Spot light options Spot light example

IES LIGHT

  • Multiplier: Use this option to modify the intensity of the IES light
  • IES list: Select one of the IES profiles located at the 'Thea Data / IES" folder, or use the 'Custom IES file' to load a custom IES file
  • Load: Click on the button to load the IES profile
  • Temperature (K): Set the color of the light in Kelvin

IES light option IES light example

In general, it is recommended to keep the default value of 1.0 because IES lights simulate physically accurate lights. To make the rendering brighter, adjust the display settings instead. The default IES light uses the sample.ies file. The IES description is saved inside each IES light component. You can safely share SketchUp models with others without including .ies files.

PROJECTOR LIGHT PROPERTIES

  • Image: Select the image that will be projected by the light
  • Aspect ratio: The detected aspect ratio of the loaded image (horizontal / vertical)
  • Power: Defines the power of the emitter and the available power units (lumens, watts, W/sr, W/nm, W/nm/sr)
  • Efficacy: The energy loss of the power that is converted to visible light
    Maximum efficacy is 683 lm/W which corresponds to lights with no energy loss. Common lights have an efficacy value between 2 and 50lm/W.
  • Attenuation: Defines the light's attenuation. Available options are: none, inverse and inverse square
  • Temperature (K): Set the color of the light in Kelvin

A projector light emits light in the shape of a square pyramid to display images on surfaces. If an image is not selected, the projector light will emit a color (defined by the color of the light's material or the temperature parameter). Use 'W x H' (width and height) to change the size of the projected image. By default, the aspect ratio is locked. Click on the chain icon to unlock it. Power, efficacy, and attenuation are the same as they are for other light types.

Projector light options Projector light example

  1. It is important that the distance between the light source and any adjacent geometry is greater than the radius of the light; otherwise, the final rendering may contain undesired noise
  2. Using custom color: Create a new SketchUp material, set a custom color and apply the material to the Thea light.