I was replacing the fixture and found the following:
Inside the ceiling box there is one black wire and three (?) white wires connected together with one white wire coming out of this connection (4 tails are connected together - 3 in and 1 out).
Before removal there was the 70s shop light fixture (fluorecent) holding 4 40W long tubes.
Any ideas if I can use a regular incandecent fixture for replacement?
Additional info - the wall switch looks kinda fancy (especially for the 70s), and may be wired for a dimmer (?). Cannot check with prior owners - it was an estate sale...