Certifications
UL 1598A Certified Lighting
Marine-Rated Safety for Shipboard & Offshore Lighting
Filters
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BLOCK H1 Series -
BLOCK H2 Series -
BLOCK HARSH Series -
BLOCK MINI H1 Series -
BLOCK MINI H2 Series -
BLOCK MINI HARSH Series -
LINEAR HARSH Series -
LINEAR Series -
LINEAR TUFF Series -
MODULAR MAX HARSH Series -
MODULAR MAX Series -
ROUND HARSH Series -
ROUND MAX EMERGENCY HARSH Series -
ROUND MAX EMERGENCY Series -
ROUND MAX HARSH Series -
ROUND MAX Series -
ROUND Series
What UL 1598A Certification Means
UL 1598A is not a standalone standard — it's a supplement to UL 1598, adding requirements specific to luminaires installed aboard marine vessels using grounded electrical systems. A fixture certified to UL 1598A has met both the base luminaire safety requirements of UL 1598 and the additional shipboard-specific requirements layered on top, referencing the U.S. Coast Guard's electrical engineering regulations and IEEE 45 (the recommended practice for electrical installations on shipboard).
This is a different concern from Marine-Grade Lighting corrosion resistance generally: UL 1598A certification is specifically about a fixture's suitability for installation on a vessel's electrical system, while marine-grade construction addresses material and housing durability against salt air and moisture. A fixture intended for shipboard installation often needs both.
UL 1598A vs. UL 1598
The relationship between these two is supplemental, not either/or:
- UL 1598 establishes the base safety requirements for luminaires generally.
- UL 1598A adds shipboard-specific requirements on top of UL 1598, qualifying a luminaire specifically for marine vessel installation.
- UL 1598A does not apply to marine luminaires used in hazardous locations, emergency lighting marine luminaires, or low-voltage marine luminaires supplied solely by battery — those fall under other, separate standards.
Where UL 1598A Applies
- Commercial and passenger vessels — general shipboard lighting on grounded electrical systems
- Offshore support and marine service vessels — interior and exterior vessel lighting
- Marine and offshore facility fit-outs — where fixtures need to meet both shipboard electrical requirements and, separately, marine-grade construction for exposed installations
Confirming the Right Certification
Confirm whether your installation is genuinely shipboard (subject to U.S. Coast Guard electrical regulations) versus a coastal or offshore facility that's marine-adjacent but land- or platform-based — the latter typically calls for marine-grade construction rather than UL 1598A specifically. For hazardous-location marine vessel installations, additional standards beyond UL 1598A apply.