According to company US Lighting Group this patent pending transformer less technology lasts far longer than any other light source. US Lighting Group is the only company to tout a 25 year warranty. It has 106 Lumens per Watt and an unprecedented 190,000 hours lifespan. Unlike other companies, all US Lighting Group test results from UL and ETL are proudly displayed on the corporate website. All products are Made In the USA on the company's in house automated robotic assembly line. For more information contact www.uslightinggroup.com