Hi Evan!
What you want is high bay lights. If it is not rated high-bay--do not consider it. These should be installed around 14' or higher from the floor.
I use a 4-light T5 with dual level lighting from Metalux(Cooper Lighting). These are available locally for me from Menards. The regular price is $119, but they can be found on sale for significantly less. I believe I paid about $80/ea for mine. Also, this price includes bulbs, so some cost savings there.
I would hardwire them in. I am a commercial shop--so I have to deal with inspectors. The lights include a disconnect inside, so the fixture can be easily removed if needed within a few seconds.
My electrician said no outlets on the ceiling unless they are twist locks.
Instead, lights are wired with conduit and MC cable whips. Code says the whip length can only be a maximum of 6'. We used Snap 2 It push in connectors to connect the MC cable to the box and fixture. These were awesome--easy to use and fairly inexpensive! Use 14/3 MC cable whips and wire lights for dual level. I had too because I have large windows in shop, so code requires dual level lighting. Now that I have it this way, I would not do anything else.
With the dual lighting, I find I often use only two of the 4-bulbs most of the time. My highest light is 20' in the air. I cannot notice a difference in light intensity from the lights that are 15' up.
If you drop outlets from the ceiling above, hardwire them in and make certain you use strain relief to hang the cable as the cable weight needs to be supported to meet code. I am not certain, but a twist lock might be sufficient on the ceiling but would cost significantly more than hardwiring.
This is what I did to meet code in my commercial shop. The cost to do so was not that bad, especially if you are doing yourself or have an electrician friend! Your code may differ slightly, you may want to look into.
BTW, I did test LED high bay fixtures and did not find any I liked. They were very expensive and all that I tested used a diffuser to spread the light or had a clear glass bottom. They quickly filled with bugs. At 20' in the air, I did not want to regularly clean them out. LED lighting has changed fast--perhaps there are different fixtures available now.
Also, just want to mention, I had these same T5 fixtures in my last shop for 8-years and never have changed a bulb.
In the pic, the two hanging cords are SO cable drops with twist lock connectors on the bottom. I have over a dozen of these drops around the shop from 120V to 480V--fantastic way to do so, and can move drop around to get precise location with the strain relief hanger. I would never do this any other way now!
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