When light bulbs are connected in series when one goes out, they all go out. the ones on the negative side of the battery stay on. the ones on the positive side of the battery stay on. the others stay on.

When light bulbs are connected in series, when one goes out, they all go out.<br /><br />In a series circuit, the current flows through each component sequentially. If one component (such as a light bulb) fails or is removed from the circuit, the current cannot flow through the circuit anymore, causing all other components to lose power and go out as well.