Need more info.
My garage is the same size. All that was in there were a couple of lamp sockets on the ceiling. I went from 100 to 150 to 200 watt incadescent bare bulbs. Even the 200s were not great and did not last very long. I was resigned to the idea that I had put up led fixtures on that high ceiling. The trouble with fixtures is they direct the light down to a limited area and you need enough fixtures to cover the whole garage and they are a PIA to install. I saw those multiple bulb socket adapters on Amazon and ebay but reviews suggest they are **** quality. What I ended up doing was buying Leviton 1 to 2 bulb adapter sockets at HD. I screwed 3 of them together to to yield 4 sockets. I did this twice, one cluster for 4 bulbs for each ceiling socket. Then used 8 100 watt equivalent bulbs. I wanted 4000K "cool white" like is typical in fluorescents and their led replacements. Those could only be found online. Color is a personal preference but I dislike the bluer leds and the 2700-3000K incandescent equivalents do not appear as bright to the eye The bulbs actually use 15 watts each so I only use 60 watts in each socket. The walls and ceiling reflect the light. There are virtually no shadows and it looks like daylight in that garage. It is BRIGHT. It is the eqivalent of 800 watts of incandescents It just took a couple of minutes to screw in the 2 clusters. The bulbs were $5.49 each. I orderd 10 so shipping was free. and the socket adapters were 3 bucks each though I probably could have gotten them cheaper. The bulbs are Lumegen and are 1600 lumens as a 100 watt equivalent should be. I spent around $65 that comes close to 6 Feits from Costco, when on sale, so it was not a great saving but I am very happy with the result, ease of installation and I have 2 exta bulbs to use elsewhere. Best of all, I did not have to sweat over locating a bunch of fixtures for best coverage.
Almost getting a little blue? 7500K is getting damn near UV and almost looks purple. I can barely tolerate 500OK. For work areas 4100 "cool white" was the color of choice for decades until they started claiming all this blue white light looks like natural sunlight. If you have ever seen a spectrum response chart for one of these led bulbs, it ain't even close.
