FRL stands for Fire Resistance Level. The three numbers represent Structural Adequacy / Integrity / Insulation, expressed in minutes:
- _ (dash) — Structural adequacy is not applicable (the downlight is not a load-bearing element).
- 120 — The system maintains integrity (prevents passage of flames and hot gases) for 120 minutes.
- 120 — The system maintains insulation (limits temperature rise on the unexposed face) for 120 minutes.
This means the downlight, when installed as part of a compliant tested ceiling assembly, is designed to prevent fire and heat from breaching the ceiling for up to 2 hours.
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