With lighting and pipework insulation, there are so many product variations that it would be impractical to list all of them. Manufacturers/suppliers of equipment in these categories will be able to advise customers on which of their products are eligible for an ECA. Therefore businesses looking to purchase products in these categories should seek confirmation of compliance for the products they intend to purchase to the ETL criteria from the product manufacturer/supplier. The confirmation issued by a manufacturer/supplier should then be used to support an ECA claim.