Earlier quoted context omitted.
We may be listing ours soon, and if we do I'm even swapping the LED bulbs for whatever's cheapest at the store. They're only about a year old and the house will sell for zero more dollars if I leave them up.
Is leaving lights in the house you sell an American thing? Unless it's built in lights like spots, all the bulbs and even fixtures usually move with the person where I'm from (the Netherlands).
Most sellers will leave anything fixed to the building like lights, sinks, toilets, doors, door handles, sockets, fitted carpets, fitted kitchen appliances, plants that are buried in the garden, fires and fireplaces, television aerials, boilers and radiators, built-in cupboards, permanently installed mirrors, and so on.
Things that aren't fixed in quite the same way have different conventions. For example paintings, light shades, freestanding lamps, rugs, curtains, plants in freestanding tubs, and freestanding appliances are often taken by the seller.
It's always possible to negotiate, of course; if the buyer and seller agree on something different, that's perfectly legal. And there are horror stories of overly trusting buyers discovering the seller has removed the turf from the lawn, and things like that.