I found this early fluorescent fixture catalogue from 1939, predating even the introduction of the F40T12 lamp. The F40T12 was listed as coming soon with only fixtures designed around the F15T12. F15T8, F20T12, and F30T8 available. It seems to predate the introduction of autotransformer based ballasts too. Interesting because most of the lights are designed for F15 and F20 lamps, the 4ft lights actually use F20 lamps in tandem. Interesting a few form factors introduced in this catalogue survived to the present day, such as the industrial, the strip light, the wraparound, and the troffer.
https://archive.org/details/fluorescentlight00nove/mode/2up