Replaced the two, two-tube 48" T-8 florescent fixtures in the garage. These are well made, solid and provide more light then the T-8s... by far. I was surprised at how much light they provide. Being LEDs they won't loose output. No more trying to install fragile new tubes when blown tubes no longer start. No more worrying about getting rid of the mercury-leaden blown tubes, either. I like these shop lights.