My shop isn't finished yet where I installed these, so I don't have alot of time with them to give an accurate assessment of their quality, but I will share what I have learned so far. Was happy to discover that this is a USA company that built these fixtures!These have come right on almost instantly (small delay from when power is supplied until they all light - no flickering as with CFL or fluorescent) in any temperature, even well below zero in the unheated shop, as you'd expect from LED lights (I will never go back to fluorescent or CFL again). The light is super bright, and the color temperature makes the light look whitish, which is perfect for the type of work I'll be doing out there (automotive, small engine). Makes it look like daylight in the shop at night, and I have no sheetrock or floor in yet. They're 12' feet above the floor (12'6" right now, without the concrete) & having 6 of these in the 30'x26' shop is more than adequate. Could've got away with only 4 here!When you plug in the 5' cord, this makes the 120v outlet on the opposite end of the unit live. Conversely, if you feed 120v to that same outlet, it will make the male prongs of the PLUG live, so be aware of that (I tested it with a multimeter, since I had a feeling this would happen). I just left the plastic prong cover on until I was ready to plug everything in, just to avoid getting shocked while testing. This is a good thing, since you can feed power from any side of the light, and have it power the next light in line with ease, no matter which side the next light in line is on. Having that outlet on the opposite side makes it super easy to install several of these without installing junction boxes or outlets next to each one.I bought 6 of these, and wired them in an "S" pattern (looking at the ceiling), connecting the female outlets to each other via two double-male cords that I made from plugs I cut off old appliances. For my application, I have no use for the pull-chain on/off switch, so I just leave all 6 on, and will eventually control them all with two 3-way wall switches, and a master wall switch that overrides those other 2 - for now, I just have an extension cord hanging from the ceiling.Comes with plenty of chain, so these can hang a good distance from the ceiling. I have a 12' garage door on one end of the shop, so I pried the links open, and removed the chain completely, leaving only the 3 clasps, and hung the light that way, up close & tight to the ceiling. This gave me plenty of clearance when the door is fully open.Customer service from the manufacturer was very good. I had one light that UPS stepped on, or drove the truck over (it still worked too - that's a good sign of quality!!). They sent me a label through Amazon, and I sent it back. I bought another one at the same time to replace it. A couple days later, once they saw the tracking info, they refunded my money for the damaged one before they had even received it. Was very happy with the service.My only complaint about this design, is that if the LEDs fail, you'll probably have to toss the whole fixture, since the imitation fluorescent bulbs containing the LEDs are not replaceable. I'd probably attempt repair somehow using parts sourced off the net. Would be nice if they made replacement parts available, should this happen in the future.Once I start using these lights full time, I'll update this review after a year or so of use.UPDATE 5/11/2019: So far, so good! Lights have been great! My only complaint with these is there is some SEVERE RF interference (seems to be a trait with all LEDs). Radio reception becomes nonexistent with the lights on, and the garage door opener won't work using the remote - shut off the lights, and everything is normal again. Other than that, the lights are very bright, and a nice white color temperature. They've handled super high humidity, low temps (-10°F and colder this past winter), and high temps alike (over 90°F). When I had a bearing failure in my air compressor, the lights flickered, so that tells me they are voltage sensitive ... but that hasn't been an issue since. Highly recommend these lights! Happy with the purchase.