I've been using Menards LED shop lights. They've had them for $10 on and off over the past year or so. Great for over the workbench, lathe, etc. I've been making the switch over from 4 foot florescent tube lights, and am mostly there.
In the barn, I wanted some high bay fixtures for general lighting. I tried a 500w LED "UFO" highbay fixture, which was, I think $90 or so. It was useless, and I returned it. I found three used 400w MH hubbell fixtures on craigslist, with bulbs, for $30. They work much, much better.