Illuminating Insights: 10 Facts About Lightbulbs

Electric lighting has illuminated our world since the late 19th century. From the warm glow of early incandescent bulbs to the efficient beams of modern LEDs, these everyday objects have a surprisingly rich history. Here are ten fascinating facts you might not know about them.

Marcus Thorne

Library note

1. A Bulb That Has Burned for Over a Century

The world's longest-lasting lightbulb, known as the Centennial Light, has been shining continuously in a California fire station since 1901. This hand-blown bulb with a carbon filament now emits a dim glow comparable to a modern nightlight.

2. Your Brain's Modest Energy Appetite

The human brain operates on remarkably little power, using only about 12 watts—roughly equivalent to a fifth of the energy needed by a traditional 60-watt incandescent bulb.

3. A Towering Tribute to Light

The Edison Memorial Tower in New Jersey is capped by a fully functional lightbulb made of Pyrex glass, standing an impressive 13 feet and 8 inches tall.

4. The Animated Origin of an Idea

The now-universal cartoon symbol of a lightbulb appearing over someone's head to signify a bright idea originated with Felix the Cat animations from the silent film era.

5. The Fame and Controversy of Invention

While Thomas Edison is famously credited with inventing the practical incandescent bulb in 1879, several other inventors, including Joseph Swan and Warren de la Rue, created similar but less commercially viable designs earlier.

6. The Stark Efficiency Divide

Incandescent bulbs are notoriously inefficient, converting only about 10% of energy into light while wasting the rest as heat. In contrast, modern LED bulbs achieve efficiency rates of around 80%.

7. A Quantum Leap in Lifespan

The average incandescent bulb lasts about 1,000 hours, whereas a standard LED bulb can provide light for approximately 25,000 hours—more than two decades of typical use.

8. Watts Measure Energy, Not Brightness

A common misconception is that wattage indicates brightness. In reality, it measures power consumption. Light output (lumens) is a separate metric; a 100-watt bulb consumes twice the power of a 50-watt bulb but is not twice as bright.

9. A Significant Source of Waste

Billions of lightbulbs, including LEDs and fluorescents, are discarded annually. While containing recyclable materials, the complex extraction process often makes sustainable disposal a challenge.

10. The Flicker You Might Not Notice

Incandescent and fluorescent bulbs emit a subtle flicker that can imperceptibly strain the eyes and hinder concentration. LED lights provide a much more steady and consistent stream of illumination.

Meet the acrobatic clouded leopard

It may look a little like a tiger, but the clouded leopard is a completely different kind of cat. This remarkable animal moves through the trees of Southeast Asia’s rainforests with incredible agility. It can race up tree trunks, support its body while hanging from a branch with a single paw, and even move while hanging upside down. Its climbing abilities are truly extraordinary.

10 Santa Crafts for Kids

There’s no more delightful way to embrace the holiday spirit than by crafting festive decor—especially when the whole family can join in the fun. This Christmas, center your creative projects around the jolliest icon of the season: Santa Claus. Using paint, paper, and recycled materials, you can bring Santa’s signature features to life—from his fluffy white beard and vibrant red coat to his rosy, cheerful cheeks. Most Santa-themed crafts are simple and straightforward, so even the most novice crafters (and the tiniest hands) can tackle them with ease in one cozy afternoon. No matter how you and your little ones picture Santa Claus this Christmas, these 10 creative, kid-friendly ideas are sure to spark joy and creativity.

Top 10 Easy Drink Recipes for Every Occasion

Whether you’re craving a morning pick-me-up, a refreshing poolside sip, or a festive mocktail for a holiday gathering, these 10 easy drink recipes balance flavor, simplicity, and versatility. They span matcha-based energizers, fruity spritzers, and cozy lattes—with options for both caffeinated and non-alcoholic needs:

Oriental Pearl Tower

Standing at 468 meters tall, the Shanghai Oriental Pearl TV Tower is one of the most famous landmarks in Shanghai. It ranks as the fourth tallest tower in Asia and the sixth tallest tower of its kind in the world. Construction began on July 30, 1991, and the tower was officially completed on October 1, 1994.

Canton Tower: The highest tower in China

Canton Tower, also known as the Guangzhou New TV Tower and affectionately nicknamed the “Slim Lady,” is one of Guangzhou’s most recognizable landmarks. It stands near Chigang Tower in Haizhu District on Yizhou Island, about 125 meters from the southern bank of the Pearl River and the Pearl River New Town. Across the river are Huacheng Square and Haixinsha Island.

Fascinating Facts About the World of Crabs

With thousands of identified species spanning the globe, crabs are among the most successful and intriguing crustaceans in our oceans. These animals are more than just coastal inhabitants; they are vital engineers of marine ecosystems, helping to sustain coral reefs and seafloor health. Despite their importance, they face increasing pressure from environmental changes, pollution, and habitat disruption.