Hunt is, of course, correct. These things with tungsten filaments are "lamps." Bulbs are what you plant in the ground. I suspect the term "bulb" meaning lamp was a result of their bulbous shapes. So why do so many people and stores insist of referring to compact fluorescent lamps as compact fluorescent bulbs? Why not "worms" or "snakes?" Beats me.
All that aside, if you call them "bulbs," I will not be thinking you are planting tulips in your locomotive (note: not your "engine," your "locomotive.")
All that aside, if you call them "bulbs," I will not be thinking you are planting tulips in your locomotive (note: not your "engine," your "locomotive.")