Panasonic’s new LED bulb goes a long way to bridging the psychological gap that keeps people buying inefficient incandescents because they prefer the way they look. Using just 4.4 watts of power, the LED filament in this bulb is rated for up to 40,000 hours of use. So if you were to install one just after you were born, you wouldn’t have to change it until your 40th birthday, with just a few hours of use every day.