Light is turned onBy default, lights are on when you insert them. You can virtually turn a light off by disabling its light source.
To turn a light on or off:
Select the light fixture you want to turn on or off.
Right-click and select Properties, or select Edit > Modify Elements > Properties.
Select the Lights tab.
To turn the light on or off, click the eye icon next to the light source name.
Light is turned on
Light is turned off
Click OK.