---
schema_version: "secwatch.filing_event.v1"
accession: "0000924168-23-000002"
form_type: "8-K"
ticker: "EFOI"
cik: "0000924168"
company_name: "ENERGY FOCUS, INC/DE"
filed_at: "2023-01-06T23:59:59+00:00"
generated_at: "2026-06-20T19:12:21.627145+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Energy Focus issues $50K promissory note to Tingyu Lin at 8% interest, due Sept 2023

## Summary
- Principal amount $50,000, interest at 8% per annum, matures September 30, 2023.
- Note issued to Tingyu Lin on December 30, 2022; prepayment allowed any time.
- Upon default, interest rate increases to 10% per annum; holder may accelerate repayment.
- Company must notify holder within 5 business days of any event of default.

## SEC filing metadata
- accession: 0000924168-23-000002
- form_type: 8-K
- ticker: EFOI
- cik: 0000924168
- company_name: ENERGY FOCUS, INC/DE
- filed_at: 2023-01-06T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/924168/000092416823000002/0000924168-23-000002-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/924168/000092416823000002/efoi-20221230.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000924168-23-000002
- JSON: https://secwatch.observer/filing/0000924168-23-000002.json
- Plain text: https://secwatch.observer/filing/0000924168-23-000002.txt

## Key facts
- Debt Financings
  ENERGY FOCUS, INC/DE incurred loan of $50,000 with Tingyu Lin at annual rate of eight percent maturing nine months from the date of issuance.
  - Instrument: loan
  - Principal: $50,000
  - Counterparty: Tingyu Lin
  - Rate: annual rate of eight percent
  - Maturity: nine months from the date of issuance
  - Event: incurrence
  source text: On December 30, 2022, Energy Focus, Inc. (the “Company”) issued a short-term Promissory Note in favor of Tingyu Lin (the “Lender”) in the original principal amount of $50,000 (the “Note”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/924168/000092416823000002/0000924168-23-000002-index.htm
- Material Agreements
  ENERGY FOCUS, INC/DE entered into Short-term Promissory Note with Tingyu Lin valued at $50,000 principal, 8% annual interest, maturity 9 months (effective 2022-12-30).
  - Action: entry
  - Agreement: credit facility
  - Counterparty: Tingyu Lin
  - Value: $50,000 principal, 8% annual interest, maturity 9 months
  - Effective: 2022-12-30
  source text: On December 30, 2022, Energy Focus, Inc. (the “Company”) issued a short-term Promissory Note in favor of Tingyu Lin (the “Lender”) in the original principal amount of $50,000 (the “Note”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/924168/000092416823000002/0000924168-23-000002-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.