- Click Render tab
Lights panel Lighting Units drop-down Generic Lighting Units. 
No lighting units are used and standard (generic) lighting is enabled.
- Click Render tab Lights panel Create Light drop-down Spot.
- Click in the drawing to specify a location for the light.
- Click to specify a target for the spotlight.
- At the Command prompt, enter n and enter a name. This name will appear in the properties and in the Lights in Model window.
You can continue to specify properties by entering options, or you can exit and set properties interactively. When you use the interactive method, you can see the results of your changes as you work.
- Press Enter twice to exit the command.
Select the light and use grip tools to change the light. You can also right-click the light and then click Properties.