Tungsten-filament bulbs were first produced in 1907, but it took five years of improvements before they were truly marketable.

By 1912, tungsten-filament bulbs - also known as a mazda or "squirrel cage" bulbs - were three times brighter and more efficient.

Their intensity and power resulted in new lighting designs like semi-indirect bowl chandeliers which directed and reflected the bulbs' light.

Tip: Install tip up or down. Bulb can fail if pointed horizontally, or at an angle.

See more items from our Reproduction Bulbs category.