I bought their recommended 8' LED florescent replacement lamps for a commercial coffee roaster customer. These are for the ceiling fixtures in their warehouse. Using the lamp manufacturer's life rating, in this application (on 10 hours a day) they should have lasted 20 years. The first one failed after 3 months, now 2 more... so one by one they are failing and rather then sending out a better quality replacement at their cost, they are issuing pro-rated credits (sigh). To me this means they do not test the lamps or source high quality products, so beware that failure might be a common experience. Also, prorating the credits is sleezy and means they do not stand behind the items they recommend. Will I buy from them again? Nope!