You can also drag a light from the Lights tab of the Tool palettes 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.
Select the light and use grip tools to change the light. You can also right-click on the light and then click Properties. The Lighting Properties palette can be used to change its properties.