Thank you @Jacob.westergaard and Thank you @Melina.Vlachousi for checking this!
Hi @Anonymous
I see that you are visiting as a new member! Welcome to the Autodesk community! 
Below is an image which shows that you can import dgn files in Revit LT
DGN (design) is the name used for CAD file formats supported by Bentley Systems' MicroStation

Please see the link HERE for information Importing or Linking CAD Formats and HERE for Importing CAD Files Using i-drop
You might also consider converting a DGN file to a DWG file using Autodesk® Revit® - though this has some limitations - there are few recommendations which you can try.
If you find posts have solved your problem, please click on 'Accept as solution' to help others with similar questions. Kudos are welcome.
Thank you.