Ok, I got the 750 lumen Neiko and have tried it out in comparison to the 390 Lumen Harbor Freight Light. The Neiko is a nice light and perfect for some situations I'm sure, but for me, the Harbor Freight light is the clear winner. Here's why:
1. Despite the Lumen spec's, the two light seem virtually identical in terms of light output. I tried them both under the car, in a dark room, aimed at a wall, etc., and it sure feels like a push to me. Maybe in a lab they can tell the difference, but not in my real world garage.
2. The Neiko doesn't have a magnetic base, but has hooks instead. I actually like hooks, but the HF light can be stuck anywhere for just the right angle, etc. The Neiko comes with a clip-on magnet, but it was so weak I couldn't get it to stick well enough to be useful.
3. The HF has a light at the end for a flashlight mode. That's missing on the Neiko. Comes in handy when you need to look into a tiny nook.
4. The HF version is hinged so you can position it for a better angle as needed. The Neiko is a solid tube.
5. The light portion of the HF is much less bulky, so can be placed in much tighter spaces for good light. The Neiko, especially with the hook on the end, can't fit in spaces anywhere near as tight.
6. The Neiko claims to have "mode buttons" on the side, but at least on my unit, they were just a solid part of the rubber mold and didn't do anything. I could change brightness of the light with the switch on the bottom, but it is a bit hard to get at.
Neiko is probably a sturdier light in the long run, since it has more bulk and no hinge etc., but I'd almost always reach for the HF light first.
Round 1 goes to HF. I'm going to order an Astro next. Stay tuned.