LEC can stand for: - Levelised energy cost, the average whole-lifetime cost of electricity from a power plant.
- Lake City (Amtrak station), Florida, United States; Amtrak station code LEC
- Lake Erie College, in Painesville, Ohio
- Lancaster Environment Centre, Lancaster University, UK
- Language Evolution and Computation Research Unit, at the University of Edinburgh
- Laredo Entertainment Center sports arena in Laredo, Texas
- LEC Refrigeration
- LEC Refrigeration Racing
- Light emitting capacitor
- Living Enrichment Center
- Lonsdale Energy Corp Centralized Heating Provider, North Vancouver, British Columbia, Canada
- Local enterprise company, Scotland
- Local exchange carrier, a type of telecommunication service provider
- Logic equivalence checking, or Formal equivalence checking, a process in Electronic design automation
- LucasArts Entertainment Company, George Lucas' computer game company
- Light-emitting Electrochemical Cell
- Levy Exemption Certificate - UK Climate Change Levy
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