100 Year Old Light Bulb Found Still Working in York County, PA

Phelps HYLO

Found in the basement of the Fire Museum in York County, PA the early light bulb is a fascinating find, particularly as it is still perfectly functional. The light is a Phelps HYLO bulb that was patented in 1904 and was designed as an energy saving bulb. The Phelps HYLO provides two different light levels, 1 candle and 16 candle, but you wont find a dimmer switch here. The bulb is screwed in partially to activate the 1 candle light level and screwed in further to up the light level to 16 candles. The original advertisement says that it cost 1 cent to run the bulb at the one candle level for 12 hours.

It is unclear how long the bulb has been in use but the building was constructed in 1903 and the bulb may have been put into use shortly after. The bulb has now been removed and added to the York County History Centre collection.

http://www.ydr.com/story/tech/2017/04/10/100-year-old-light-bulb-discovered-york/100265152/

Related Articles

Changing Scene

  • Jan 14, 2026 - GVA Lighting Promotes Gareth Bruce to Vice President – Sales & Marketing

    GVA Lighting Promotes Gareth Bruce to Vice President – Sales & Marketing

    GVA Lighting is pleased to announce the promotion of Gareth Bruce to Vice President of Sales and Marketing, effective December 5th, 2025. Gareth joined GVA in May 2024 as Regional Sales Manager – Southeast, bringing more than two decades of lighting industry experience from Philips / Signify. He was promoted to Director of North American Sales in September 2024 and has since… Read More…

  • Jan 14, 2026 - Intralec Electrical Products Proudly Representing SATCO NUVO Lighting Solutions

    Intralec Electrical Products Announces SATCO NUVO Representation

    Intralec is proud to represent SATCO | NUVO lighting solutions for commercial, residential, and industrial applications. SATCO | NUVO is a major supplier of lighting products, with solutions for nearly every lighting market across the commercial, residential, and industrial landscape. With over 1.5 million square feet of inventory throughout North America and thousands of products… Read More…

Design

  • EB Horsman: Can LED Roadway Lighting Enhance Road Safety & Efficiency?

    EB Horsman: Can LED Roadway Lighting Enhance Road Safety & Efficiency?

    At EB Horsman, they recognize that effective roadway lighting is a crucial component of public safety. With Lumec’s LED roadway lighting solutions, communities can ensure reliable, high-quality illumination that supports safer travel for everyone, day or night, while also improving energy efficiency and long-term operational performance. High-quality roadway lighting is a critical component of public… Read More…

  • Prolux Lighting & Controls: Project Spotlight – Residential House in the Kootenays

    Prolux Lighting & Controls: Project Spotlight – Residential House in the Kootenays

    Have a look at this custom residential home in the Kootenays, where Prolux utilized the HALO RL6 Slope Ceiling Direct Mount fixtures by Cooper Lighting Solutions designed specifically for sloped ceilings. These luminaires provided consistent, high-quality illumination while maintaining a clean, low-profile ceiling aesthetic. Their direct-mount design allowed for seamless integration throughout the home, supporting… Read More…

New Products

  • Philips Hue Transforms Lighting Design with the Hue SpatialAware Feature That Understands Your Space

    Philips Hue Transforms Lighting Design with the Hue SpatialAware Feature That Understands Your Space

    Signify is introducing Hue SpatialAware, which will transform how Philips Hue users experience light scenes. This feature analyzes the layout of your room and the placement of your Philips Hue lights to create the optimal lighting experience tailored to your unique environment. It’s like having a lighting designer in your pocket, allowing you to experience… Read More…

  • Liteline: New LUNA Fire Driver for 3.5″ Fixture

    Liteline: New LUNA Fire Driver for 3.5″ Fixture

    Introducing a new lower-cost driver option for LUNA Fire! This 12W, 120V driver with TRIAC/ELV dimming is designed to significantly reduce cost while maintaining performance, giving you more flexibility.  The LUNA Fire meets UL 1598 / 2108/ 263, CSA C22.2 #250.0 / 250.2, and ULC-S101 safety and building construction requirements granting inherent 2-hour fire-rated protection. It… Read More…