Emergency? Call 1-800-ALLIANT (800-255-4268)

What Should You Ask (to contractors, distributors, and manufacturers)?

Has the product been tested per the Illuminating Engineering Society of North America (IESNA) standards of LM-79-08 (Method for the Electrical and Photometric Measurements of Solid-State Lighting Products) and LM-80-08 (Method for Measuring Lumen Maintenance of LED Light Sources)?

  • Both of these tests have been utilized in DOE’s CALiPER testing. Do not settle for an answer that the product “is in testing”, secure the proper documentation.
  • ENERGY STAR® certified product has been tested per the standards listed.

What are the delivered lumens and lm/watt of fixture?

  • This is one way to compare different product / brands for the efficiency of the product.

What is the expected lifetime of the fixture?

  • In some cases, the fixture will fail before the lamp.

What is the expected lifetime of the driver?

  • Drivers in a retrofit street-lamp or parking light may not be properly designed for the system and failure could occur. Confirm with your lighting designer.

How much does color temperature vary from fixture to fixture?

  • In the manufacturing process there may variability on the production panels and there have been cases that quality control is not in place to limit variability in the color.

What is the warranty of the product and what is covered under warranty (should be at least 5 year warranty)?

  • Driver and LEDs should be covered. Check the finish warranty as well.

What happens when a fixture fails and needs to be replaced?

  • Does the manufacturer or distributor have a plan to match the color temperature and output.