Create panel > Lights > Omni button
Create menu > Lights > Omni Light
Tab panels > Lights & Cameras tab > Omni Light
Left: Top view of an omni light
Right: Perspective view of the same light
An Omni light casts rays in all directions from a single source. Omni lights are useful for adding "fill lighting" to your scene, or simulating point source lights.
Omni lights can cast shadows and projections. A single shadow-casting omni light is the equivalent of six shadow-casting spotlights, pointing outward from the center.
Omni light icon
When you set a map projected by an Omni light to be projected using the Spherical, Cylindrical, or Shrink Wrap Environment coordinates, the map is projected using one of these geometries. This is the same way maps are projected by the UVW Map modifier. When you use the Screen Environment coordinates or Explicit Map Channel Texture coordinates, six copies of the map are projected radially.
Tip: Omni lights can generate up to six quadtrees, so they generate ray-traced shadows more slowly than spotlights. Avoid using ray-traced shadows with omni lights unless your scene requires this.
See also
Procedure
To create an omni light:
On the Create panel, click Lights.
In the Object Type rollout, click Omni.
Click the viewport location where you want the light to be. If you drag the mouse, you can move the light around before releasing the mouse to fix its position.
The light is now part of the scene.
Set the creation parameters.
To adjust the light's effect, you can move it as you would any object.