Are you asking because you want to buy some, or because you don't believe what I wrote?Can you provide a link to those $10 fixtures and $1.50 bulbs? BTW, the T8 fixtures I used have 3 bulbs. So I'm using $9 bulbs, which are available at the local big box stores.
Here are the shop lamps at Menards for $10.97. They aren't on a special price now, they are frequently available for less than $10
While you are there, pick up some bulbs, they are $1.98 each.
So, that is 385 lumens per dollar. If anyone knows where complete LED fixtures and lamps are available for that price, chime in. Initial price isn't everything, but it is often a significant factor when the utilization rate will be low. Add in the fact that the lumens per watt are about the same as LEDs, and, well, you can see why this might be an attractive approach.
This is the first place I checked, you can probably do better ( I have). I'm also sure it is possible to spend a lot more, as you did (I'm not questioning what you spent), I just didn't want anyone to get the idea that it was necessary to do so. Merry Christmas.