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I think beer was first consumer product. Then books.
Some say "ladies of the night".
Oil lamps predate electric lamps, though oddly mantels to dramatically increase brightness of gas lamps and oil lamps using pressurised vaporised kerosene/paraffin came after carbon filament electric bulbs. Edison didn't invent light bulbs, but his company did invent a better carbon fibre (Platinum and tungsten already known but too expensive for different reasons).
Kerosene only replaced canola (rape seed oil), sunflower, olive and whale oil for lamps after gas lighting and electricity had already arrived in cities.
Batteries predated electric lights. Used for telegraphs and also indicator boards and electric bells.
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