Most obvious options: - Use a large bottle - Use a small lightbulb - Construct the bottle around the lightbulb - Construct the lightbulb inside the bottle

Most obvious options: - Use a large bottle - Use a small lightbulb - Construct the bottle around the lightbulb - Construct the lightbulb inside the bottle - Cut off and replace part of the bottle; this can be done almost seamlessly - There's no technical reason that a lightbulb needs to be made of glass, so we can make a collapsing one, and unfold it inside like a ship-in-a-bottle