The old school bulb is a thing of the past. Starting today, the incandescent light bulb can no longer legally be produced in the United States. Why? Because it’s not energy efficient enough. So it’s LED and CFL all the way now. These bulbs are expected to lower the environmental impact of artificial lighting, and here’s the big plus, save money. And if you’re traditional, don’t worry. The good ‘ole incandescent bulb will still be on shelves until supplies run out.