You open the ceiling plan, click Lighting Fixture, click where the light should go, and Revit complains about a host. Or the light lands on the floor instead of the ceiling. It happens because the ceiling lives in the linked architectural model while the light is looking for a different plane.
This article places a Revit lighting fixture in the 2027 release in the order that works: load the family, host the lights on the linked ceiling, add a switch, group the lights into a switch system, then circuit them back to a panel. To learn the whole electrical workflow on one sample building, see the Institute's Revit MEP course.
Which category lights belong to, and what you need first
Lights belong to the Lighting Fixtures category. Switches do not: they are Lighting Devices, placed with a different command. The two meet in a switch system, the record of which switch controls which lights.
Three things must exist before you place anything:
| You need | Why |
|---|---|
| A reflected ceiling plan of the level | It looks up at the ceiling, which is what you are laying out |
| A linked architectural model where the ceilings are visible | Recessed lights host on a ceiling face, and ceilings usually sit in the architectural file |
| Light and switch families loaded into the project | A company file often has no lighting family at all |
The third one catches people out. Click Lighting Fixture in a file with no lighting family and Revit asks outright.
Files to follow along, and where the families come from
The article on Revit MEP sample files shows how to take a copy of the Institute sample file and link the Snowdon Towers architectural model that ships in the Samples folder. It has a ceiling plan per level, which is all this article needs.
Light families come from Autodesk online content: Insert › Load from Library › Load Autodesk Family. Type downlight in the search box and a list appears, split between Lighting › Architectural › Internal and Lighting › MEP › Internal.
The two branches differ in what they are for. A revit downlight family from the MEP branch carries an electrical connector, so it can be circuited; the architectural one leans on geometry and the light source for rendering.
Wall lights answer to the keyword sconce, and switches to lighting switch, where you want the Lighting Switches family.
Steps 1–4: open the ceiling plan and load the families
Step 1. In the Project Browser, open the Ceiling Plans view of the level you are working on. Set the view Discipline to Electrical so the electrical elements read more clearly over the architecture.
Step 2. Go to Systems › Electrical › Lighting Fixture. If the project has no lighting family, Revit offers to load one; answer No and load deliberately in the next two steps instead of pulling in something you will not use.
Step 3. Go to Insert › Load from Library › Load Autodesk Family, search downlight, tick one or two families and click Load.
Step 4. Repeat for sconce if you need wall lights, and for lighting switch to get the Lighting Switches family. Loaded families appear under Project Browser › Families › Lighting Fixtures and Lighting Devices.
Steps 5–8: place a revit ceiling light on a linked ceiling
Step 5. Call Systems › Electrical › Lighting Fixture again. The ribbon switches to the Modify | Place Fixture tab, which is where every Revit lighting fixture is placed from. Pick the type in the Type Selector.
Step 6. Look at the Placement panel. A face-based family offers three modes. Place on Vertical Face hosts on a vertical face such as a wall, Place on Face hosts on any face visible in the view, Place on Work Plane places against the work plane when there is no face to host on.
Step 7. Keep Place on Face and hover over the ceiling. The status bar at the bottom names the linked model, which means the cursor has found the ceiling face inside the architectural file. Click to place the light, then click the remaining positions. Press the space bar while placing to rotate.
Step 8. Press Esc twice, select one of the lights and read the Properties palette. Host says what the light is attached to, Elevation from Level is its height above the level, and Schedule Level is the level it will be counted on in schedules.
This also answers the common question about ceiling lights: a light does not sit at the height you typed, it sits on the face it hosts on. Change the ceiling height in the architectural file and the light follows.
Steps 9–11: fix the voltage, then build the revit lighting circuit
Step 9. Select a light and click Edit Type. Autodesk light families are built for the American grid, so Ballast Voltage reads 120 V. Click Duplicate, name the type after your own standard, then set Ballast Voltage to 220 V, or whatever your grid uses. The same dialog holds Load Classification, Apparent Power and the two recessing dimensions.
Skip this and the next step stalls: the panel list will be empty, because no distribution system in the project matches 120 V.
Step 10. Select the lights that share a circuit: click the first, then hold Ctrl and click the rest. On the Modify | Lighting Fixtures tab, the Create Systems panel has two buttons: Power builds an electrical circuit, Switch builds a switch system.
Step 11. Click Power. The ribbon switches to the Electrical Circuits tab. Open the Panel box and pick the panel that feeds this circuit, an apartment board for instance. Connection Type reads Breaker.
Defining voltages, distribution systems and reading the load table of the panel is the subject of electrical panels in Revit.
Steps 12–15: switches and the revit switch system
Step 12. Go to Systems › Electrical › Device, click the arrow under the button and choose Lighting. This is the Lighting Devices category, not the Lighting Fixtures category of the lights themselves.
Step 13. Pick the switch type in the Type Selector, choose Place on Vertical Face on the Placement panel and click the wall. The switch hosts on the wall face, so it travels with the wall later.
Step 14. Select the lights that switch controls and click Create Systems › Switch. The ribbon switches to Modify | Switch System with three buttons: Edit Switch System to add or remove lights, Select Switch to nominate the switch, Disconnect Switch to drop it.
Step 15. Click Select Switch, then click the switch you placed. Select any light in the group again and dashed lines appear, linking the lights to the switch: that is the switch system. The Switch ID parameter in the light's Properties records which switch controls it.
A switch system is independent of the circuit. The lights still need to sit in a Power circuit before their load reaches the panel; the switch only records the control relationship.
Wall lights and rooms with no ceiling
The three placement modes from step 6 are really three site situations.
| Situation | Placement mode | Watch out for |
|---|---|---|
| Recessed light, ceiling in the architectural file | Place on Face, click the ceiling | The status bar must name the linked model |
| Wall light or uplight | Place on Vertical Face, click the wall | The plan symbol of a wall light depends on the family |
| Plant room or basement with no ceiling | Place on Work Plane | Set the work plane at mounting height first |
Autodesk's page on placing lighting fixtures adds one thing worth remembering: a light whose connector falls outside a space contributes nothing to that space's lighting data, and the cure is to enable the room calculation point in the family.
From CAD to Revit: light symbols and layouts
In AutoCAD you insert a block per light type, draw the line from light to switch by hand, and count the lights manually to build the schedule.
| Task | AutoCAD | Revit |
|---|---|---|
| Light symbol in plan | A block in the drawing | 2D linework inside the family |
| Mounting height | A text note | The light hosts on the ceiling; height comes from the host |
| Which light on which switch | A line drawn by hand | Switch system and the Switch ID parameter |
| Lighting load | Added into a spreadsheet | Added to the panel through the circuit and load classification |
| Counting lights | By hand | A Lighting Fixtures schedule |
To match your company symbol, edit the 2D linework inside the family; that is the subject of lighting fixture families.
When the light will not host on the ceiling
| Symptom | Cause | Fix |
|---|---|---|
| Revit says it could not find a host | The wrong placement mode, or no face where you clicked | Switch mode on the Placement panel, or click where a ceiling exists |
| The light sits at the wrong height | It is hosted on a work plane, not on the ceiling | Select it and use Pick New on the Work Plane panel to point at the ceiling |
| Clicking Lighting Fixture asks to load a family | The project has no lighting family | Load one through Load Autodesk Family, then call the command again |
| The Panel box offers only None | The family voltage matches no distribution system | Change the Ballast Voltage of the type, or add a voltage definition |
| Lights vanish after the link is reloaded | The old ceiling was deleted, so the lights are orphaned | Select them and Pick New onto the new ceiling |
| No dashed line from the light to a switch | The light is in no switch system | Select it, Create Systems › Switch, then Select Switch |
Three things people often get wrong
| What people say | What the 2027 release does |
|---|---|
| Switches are in the same category as lights | Lights are Lighting Fixtures, switches are Lighting Devices, placed with two different commands |
| Linking a light to a switch creates a circuit | A switch system only records control; the load reaches the panel through a Power circuit |
| A downloaded family is ready to use | Autodesk library families carry 120 V and must be changed to match a 220 V grid |
Frequently asked questions
Ceiling plan or floor plan for placing lights?
The ceiling plan. It looks up at the ceiling, so you see the face the light hosts on.
Why will the light not host on the linked ceiling?
Either the placement mode is not Place on Face, or there is no ceiling face where you clicked. Hover and read the status bar: it must name the linked model.
Where do I get a revit downlight family quickly?
Insert › Load from Library › Load Autodesk Family, search downlight. Check the voltage in Type Properties before circuiting it.
How does a switch system differ from a circuit?
A switch system records which switch controls which lights. The circuit is what carries the load to the panel and shows in the panel schedule.
Can I swap many lights to another type at once?
Yes. Select one, right-click and choose Select All Instances, then pick the new type in the Type Selector.
Related articles
- Electrical panels in Revit — voltages, distribution systems and panel schedules
- Drawing power in Revit — receptacles, switches, circuits and wiring
- What is Revit MEP — the three M, E and P systems
- Lighting fixture families — light source, IES files and plan symbols
- Schedules in Revit — counting lights and exporting to Excel