These are obsolete, but widely available, energy wasting incandescent lightbulbs. This type of bulb wastes 95 percent of its energy generating heat instead of light. This wasted energy mostly comes from burning fossil fuels like coal - causing climate change by adding carbon dioxide to our atmosphere.
We crushed these bulbs in Berlin while EU and G8 ministers were meeting there for the, "Energy Efficiency: Shaping Tomorrow's World" conference to send them a message. Greenpeace is calling for national bans on energy wasting lightbulbs, and enforcement of an EU-wide mandatory efficiency standard on domestic lighting by 2010.