Light bulbs no longer come in one or two standard shapes. Those common light bulbs, the ones that come in various wattage levels, are still available. But in addition to those, you can pick up heat bulbs, flood lamps, Edison decorative bulbs, simulated candle flames, and simulated vintage light bulbs. In addition, you can pick up fluorescent bulbs or LED bulbs that are supposed to reduce electric usage, bulbs that work with dimmer switches. Some bulbs come with standard fixture attachments, and some have small screw in attachments to fit specialty lights. There are bulbs for any lamp.