Simulates lighting in the scene based on an image of an environment. Image-based lighting can use High Dynamic Range Images (HDRI) to simulate realistic lighting and reflection effects.
You can specify only one image-based light in the scene at a time. Other light types can be used with image-based lights and the overall scene illuminance is cumulative.
Displays the light’s transformation manipulator. The manipulator display depends on the light type. For a point light, a move manipulator appears to let you reposition the location in X, Y, Z. For a directional light source a rotate manipulator appears to let you rotate the direction of the light source.