So when customers ask us how many ‘Watts” do I need to replace an existing light source, we always convert them to lumens.
• Pay special attention to the lumens per watt of a fixture. IT DOES MATTER. A LED product at 135 lumens/watt will consume far less energy than a LED product producing 97 lumens/watt. Not all LED solutions are the same. (remember, always buy on the lumens you need, never on the watts you think you need.).
• To calculate lumens per watt, take the total number of lumens a product produces and divide it by the watts it consumes.
For indoor fixtures, figure on:
utility company. You can check if a product is DLC Qualified on the DesignLights Consortium website. DLC has rebates for Commercial LED Lighting and Industrial LED Lighting
• Rebates with DLC Premium should be higher than rebates with DLC Standard. Your utility company is typically who provides the rebates and sets the rebate amounts. Check their website.
• All UL Listed or ETL Listed.
• Replacing the light parts of an existing fixture with the a Retrofit unit will not void the UL/ETL Listing of the fixture. However, the exception to this rule are explosion proof rated fixtures (ie. Class I Div 2). Never retrofit a certified explosion proof fixture. UL1598C does not cover these types of retrofits.
• ETL Listing is the same as UL Listing. They perform the same test, and the certification is the same. The only difference is that the company who performs the test.