I picked up 3 LED shop lights from Sam's Club to see how much light they put out. I put in standard Incandescent 300 watt bulbs in my new shop & love the light output, but they pull a lot of power! These 46" long twin LED light strip assemblies have a rated output of 4200 lumens compared to a max of 3600 lumens from the 300 watt incandescent bulbs, but only use 40 watts of power! More light, and only 13.3% the power usage. Average life is 50,000 hours, so that equates to 15 years at 8hrs per day, 7 days a week. I'm not in the shop all that long every day, and never turn on all the lights at one time and still have a $24 light bill, with likely $20 of it being just the lights. At that rate, the savings will pay for 13 of these fixtures in just 3 years. Even quicker if I spent more time with more of the lights on. Guaranteed 5 years, so they are a definite savings even if they all died at the 5 year mark, which I seriously doubt will happen.
I put these 3 up on one light circuit to give them a try, and I like the results, so I will be getting 10 more when I can get to Sam's again.
They are "instant on full bright", so no waiting for full output like UFL bulbs.
When I started building my shop, these LED lights weren't available for this low a price, so I put in std bases so I could screw in outlet plugs when I wanted to change lighting, and now is the time.