eBay item number 363099630484 is an ad from a1949 issue of American City Magazine. It shows a GE form 108 luminaire. I don’t recall ever seeing this luminaire listed in any GE catalog that I have come across. It utilized either a 25,000 lumen series street light bulb or a 1500 watt standard multiple incandescent bulb. Another option was to utilize TWO 400 watt mercury vapor bulbs.

The giant teardrop fixture! Never seen one.