About Crownlite

Underwriters (UL) Laboratories Listing Authorizations

We maintain several UL listings
Crownlite Mfg. Corp. has been manufacturing UL listed products for over 60 years.

There is often confusion about what “UL LISTED” actually means. By definition:

1. LISTED: Equipment and materials included in a list published by an organization (in this case Underwriter’s Laboratories) acceptable to the “Authority Having Jurisdiction” or “AHJ” (in this case our customer or the AHJ in the local where the products are installed) and concerned with product evaluation, that maintains periodic inspection of production of listed equipment or materials and whose listing states either that the equipment or material meets appropriate designated standards or has been tested and found suitable for use in a specified manner.

2. LABELED: Equipment or materials to which has been attached a label, symbol, or other ID mark of an organization (in this case Underwriter’s Laboratories) acceptable to the AHJ and concerned with product evaluation, that maintains periodic inspection of production of labeled equipment or materials and by whose labeling the manufacturer indicates compliance with the appropriate standards or performance in a specified manner.

UL listings usually cover entire families of products. To obtain a UL listing a manufacturer submits a representative sample product to UL for inspection. If UL determines the product meets it’s applicable standards it authorizes the manufacturer to affix a UL label to the product and initiates periodic in factory inspections to insure compliance. Labels are only applied at the point of final assembly where the product or system is considered to be finished and complete. The honesty and integrity of the manufacturer is an integral part of this system. Crownlite is extremely proud of the excellent reputation it has earned for engineering and producing products meeting the highest standards of quality and performance. Our relationship with UL and the industry in general is excellent.

We maintain several UL listings under UL standards 1598 (general coverage - E79622, E189227, E79621, E137911, etc), UL 153 (Portable lamps - E96645), and UL48 (Electric signs - E226177 - a display having lettering is considered a “sign” by UL), and several others. We also produce several products with electrical distribution systems suitable for listing by our customers under UL65 (wired cabinets).

Frequently our customers are asked to obtain UL listing for their entire display or sign system, rather than on just the lighting subsystem. Since UL labels are only applied at the point of final assembly where the product or system is considered to be finished and complete, they are required to obtain their own listings. Then product inspections take place, and UL labels are affixed, in their own factories.

When a Listed and Labeled product is incorporated into another product or system, it becomes a “Recognized Component” of that new product or system. When UL investigates the new larger system the listing process is faster and easier when Recognized Components are used. This is because UL will not have to reinvestigate products/components already UL listed on their own. The UL listing and labeling on the new larger system indicates UL has investigated all the components in the context of the new system and found the entire new system suitable; meeting their requirements and standards, and suitable for listing and labeling as a separate finished product on it’s own. This new listing supercedes any listings or labeling of the recognized components inside.

It is a standard procedure for us to bring actual samples of custom products to UL before making customer samples or moving to production. We do not proceed without UL’s agreement the system is suitable. If you would like to speak directly with Underwriter’s, please let us know and we will arrange a conference call with our UL liaoson. Feel free to ask what UL thinks about Crownlite, our integrity and professionalism.

Should you or your customer have any further questions regarding this article or any Crownlite product,
Please >> Contact Crownlite.

The Crownlite Knowledge Base is supplied as a convenience only. Crownlite assumes no responsibility or liability for: errors, omissions, misinterpretations, relevance, or the application to any purpose, for its Knowledge Base listings. We recommend the reader reconfirm all information before using it for any specific purpose.


Please see the COMPLETE ARTICLE below for PDF copies of our actual UL Listing Authorizations.

» View/Print/Save Complete Case Study Article

get_adobe_reader.gif Some files can be viewed using Adobe Acrobat Reader. Please click on the "Get Adobe Reader" icon to download this free viewer

CROWNLITE MFG. CORP. 1546 Ocean Ave., Bohemia, L.I., N.Y. 631.589.9100, Fx 631.589.4584
©2021 Crownlite Manufacturing Corp. Inc. All Rights Reserved.