Residential energy credit for 2019

I want to amend my 2019 tax return to add a residential energy credit.

How can I determine if the skylights we bought qualify?

TT states:

Homeowners should check for the following:
- the manufacturer's tax credit certification statement before purchasing or installing any of these improvements (usually found on the manufacturer's website or with the product packaging. NOTE: The credit certification is for your records and NOT sent to the IRS.
- the IRS cautions that the manufacturer's certification is different from the Department of Energy's Energy Star label, and not all Energy Star labeled products qualify for the tax credits.

The website of the skylight states that it is "Energy Star Qualified". I can't find any other information. Is this sufficient, or what do I need to look for? (What do I need to keep for records?)