Storage depends on the bulb. For the tail lights, turn signals, stop and rear running lights, no problem. They're small and easily stowed in the cardboard containers they come in. Modern headlight bulbs are much the same, an H1 or H7 just doesn't take a lot of room and the container they come in protects them. Old-fashioned sealed beams are a bit harder. If it's the two-headlight system so many of us driving older vehicles use, the bulbs are huge and not so easy to store or protect. It can be done, but it's quite a bit harder.