For most people, a fluorescent tube light with burnt-out filaments is simply waste. But for rural innovator M. Narsimha Chary, it became the starting point for an unusual journey of experimentation.

Chary developed an experimental method to relight fluorescent tube lights even after both their filaments had completely burned out. His method worked without a conventional choke or starter and was designed to make use of the residual mercury inside the tube.

The idea also had an environmental motivation. Fluorescent tubes contain mercury, a hazardous substance that can become a concern when such lights are discarded. By extending the life of a failed tube, Chary hoped to reduce waste while making use of the material already inside it. He later reported operating one such revived tube continuously for around five years, observing that the residual mercury was eventually depleted.

A Global Recognition for a Grassroots Idea

Chary’s unusual innovation soon attracted international attention.

In 2015, the Siemens Foundation’s “Great Minds, Long Miles” initiative selected rural innovators from around the world. Chary’s patented tube-light innovation was among those considered, and it eventually won the First Prize at the global level. 

Speaking to The Brighter World, Chary said that his work also caught the attention of Discovery Channel and Discovery TLC, which produced a roughly 30-minute special featuring him and his innovation for international audiences.

His tube-light innovation was subsequently granted national patent rights in India.

Then Came COVID-19

When the COVID-19 pandemic brought the world to a standstill, Chary began looking at his earlier work from a completely different perspective. He turned his attention to UV-C light, exploring whether his filament-less technology could be adapted to generate and optimise UV-C output.

With support from the Telangana State Innovation Cell (TSIC) and technical assistance from the International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), the equipment was developed and taken through institutional validation.

The biological testing was conducted by Hyderabad-based CSIR-Centre for Cellular and Molecular Biology (CCMB).

According to the reported CCMB testing, Chary’s Ultraviolet Box with filament-less UV-C Light and Lux Optimisation was able to neutralise 99 per cent of viral particles under the tested experimental conditions. The reported experiment used a 30-watt, 254-nanometre UV-C light, with the virus sample positioned 30 centimetres from the light. Chary said testing was carried out across different exposure times, ranging from 15 seconds to 1,200 seconds.

According to Chary, his Global 369 invention is designed not only to help combat viruses, but he also believes it could play a role in protecting against serious health conditions such as heart attacks and cancer. However, these broader health claims would require independent scientific research and clinical evidence to establish their effectiveness and safety.

CCMB later signed an MoU with Chary to further explore the technology if new interventions or developments emerged from either side. Chary has named this new innovation Global 369.

An Innovator Driven by Curiosity

CCMB Director Dr Rakesh Mishra highlighted the value of supporting small entrepreneurs and start-ups with innovative ideas, noting that the institute was willing to test, validate and provide technical assistance wherever possible. TSIC also worked with Chary to explore possible avenues for scaling up the technology.

For Chary, however, the journey has always been about more than recognition. From a failed tube light that others might have thrown away to an experimental technology developed during a global health crisis, his story reflects the power of curiosity and persistence.

Sometimes, innovation does not begin in a sophisticated laboratory. It begins when someone looks at an ordinary problem and simply asks: “What if there is another way?"