A product page may refer to a UL standard, a UL certification mark and a Class/Division rating. Those are related pieces of information, but they do not mean the same thing.
A standard describes evaluation requirements
UL 844 addresses electric lighting fixtures for hazardous locations. A mention of the standard does not prove that every product or configuration in a family is listed. Find the exact model and scope in the certification documentation.
A marking describes permitted scope
Read the class, division or Zone; gas or dust group; temperature marking; ambient limits; and any special conditions. A generic hazardous-duty description leaves these selection requirements unresolved. Wet-location protection and ingress ratings are separate checks.
Match the supplied configuration
Check model suffixes, input and lamp-side voltages, transformer inclusion, cord and plug options. A document for one light head may not cover every transformer-fed assembly. For replacement components, verify the approved parts and instructions rather than assuming physical interchangeability.
Confirm local acceptance
North American certification and ATEX or IECEx documentation serve different regulatory settings. The project may require more than one approval. A testing laboratory's general capability is not evidence of a particular WorkSite product's certification.
Retain the certificate or listing reference with the product instructions and full ordering code. This gives purchasing, maintenance and the site reviewer the same identifiable equipment to check.
References: OSHA 1910.307 — Hazardous (classified) locations · UL Solutions — North American hazardous-area certification · IECEx — Equipment certification questions