2020 Fusion allows you to easily manage lighting units on your drawing. You can control the light within a room by adjusting its intensity or colour.
This can be achieved by selecting a group of lights (area).
The "manage lighting" control allows you to create, rename, and delete areas and move lighting units to another area.
This option provides you with the ability to turn on/off all lights in a given lighting area.
(If you want to manage lighting, you have to first put in place lighting units to your design)
Select lighting units
1.In the View tab, in the Lighting group, open the Manage list option.
2.Select the required lighting unit(s).
TIP: You can hold down the SHIFT key on your keyboard and click on the required lighting units.
3.To select all the user-selected lighting units, click on the Select All button.
4.On the View tab, in the Display group, click on the Perspective view to see the selected light(s).
NOTE: You can navigate to the Perspective view by pressing CTRL+ 5 on your keyboard.
Set a group of lights
1.In the View tab, in the Lighting group, open the Manage list option.
2.Select the lights that you want to include in the group of lights.
TIP: You can select the light units in the project (from the Plan, Elevation or Perspective view).
3.Click on the New Area option.
4.Within the New Area dialogue box, name the new group and click OK. 
5.The three lighting units you previously selected in the No Area Defined section appear in the new named Lighting area1 section as shown in the picture below.
Recall a user-defined group of lights
1.In the View tab, in the Lighting group, open the Manage list option.
2.Right click on the required named area to open the list of options. For the example below, Lighting area1 line was selected.
3.Click on the Select Area option.
Rename a user-defined group of lights
1.In the View tab, in the Lighting group, open the Manage list option.
2.Right click on the user-defined lighting area that is to be renamed. For the example below, Lighting area1 line was selected.
3.Click on the Rename Area option.
4.Within the New Area text box, make the required changes and click OK.
Move lighting units from one group to another
1.In the View tab, in the Lighting group, open the Manage list option.
2.Beneath the No Area Defined heading, hold down the SHIFT key on your keyboard to keep the Manage window open and click on the required lighting units you want to move.
The lighting unit is selected when it is highlighted with a yellow border, as shown in the picture below.
3.Click on the Move to Area option.
4.Within the Move to Area window, click in the Area Name list to open the list of lighting areas, and then select the area you would like to place the lighting unit in. 
5.Click OK.
Delete a user-defined group of lights
1.In the View tab, in the Lighting group, open the Manage list option.
2.Right click on the user-defined lighting area that is to be deleted. For the example below, Lighting area1 line was selected.
3.Click on the Delete Area option.
4. A dialogue box will prompt you to confirm the deletion. Select Yes to delete the lighting area or click No to close the dialogue without deleting.
Turn on or off a group of lights simultaneously
1.In the View tab, in the Lighting group, open the Manage list option.
2.Right click on the user-defined lighting area that is to be turned on or turned off. For the example below, Lighting area1 line was selected.
3.Click on the Turn On All Area Lights option or click on the Turn Off All Area Lights.
Increase or decrease the intensity of the selected light(s)
1.In the View tab, in the Lighting group, open the Manage list option.
2.Right click on the required user-defined lighting area and click on Select Area.
3.Click on the Items tab to enable the lights option.
4.In the Items tab, in the Lights group, select the minus icon to reduce the selected area intensity, or the plus icon to increase the selected area intensity.
NOTE: You can move the slider bar to set the required light level.
Change the colour levels of the selected light
1.In the View tab, in the Lighting group, open the Manage list option.
2.Right click on the required user-defined lighting area and click on Select Area.
3.Click on the Items tab to enable the lights option.
4.In the Items tab, in the Lights group, click on the Colour list.
5.Within the Theme Colours window, make the required changes.
Reset modified lights to their original state
1.In the View tab, in the Lighting group, open the Manage list option.
2.Right click on the required user-defined lighting area and click on Select Area.
3.Click on the Items tab to enable the lights options.
4.In the Items tab, in the Lights group, click on the Reset option.