- Who
- TRIL INFOPARK LIMITED (Ramanujan IT City)
- What
- 2652 people
- Where
- India (Chennai)
- When
The largest energy efficiency lesson is 2,652 participants, achieved by TRIL Infopark Limited (Ramanujan IT City) (India) in Chennai, Tamil Nadu, India, on 14 December 2018.
This is the first successful attempt at this record since 2012.
