Good morning everyone,
It’s an absolute honor to stand before you today as we celebrate something fundamental to life, knowledge, and progress—light.
May 16th, the International Day of Light, marks a significant event in scientific history: the anniversary of the first successful operation of the laser in 1960 by physicist Theodore Maiman. That moment was more than a technical achievement. It became a beacon of innovation—illuminating the path for a multitude of disciplines and technologies that we rely on every day.
But let me ask you something. When you flick on a light switch, glance at your smartphone, or walk beneath a streetlamp, do you stop to consider the power that light holds—not just physically, but socially, economically, and culturally?
Light touches every facet of our lives. It enables sight, drives photosynthesis, fuels innovation, and powers much of the modern world. And on this day, we come together to honor that—by celebrating how light-based technologies have transformed our societies and how they continue to shape our future.
Let’s begin with science and technology.
Light has been at the heart of some of the most revolutionary scientific discoveries. The laser, for instance—once just a laboratory curiosity—has become ubiquitous. It’s used in medicine for eye surgery, in manufacturing for cutting and welding, in communications through fiber-optic cables, and in entertainment through audio and video systems. Lasers even help scientists measure the gravitational waves rippling through the fabric of space-time.
And what about photonics? Photonics is the science of light generation, detection, and manipulation. It is now as critical as electronics. Light-based technologies are powering breakthroughs in data transfer, clean energy, remote sensing, and diagnostics. From satellites that monitor climate change to smartphones that recognize your face—light is the invisible architect behind it all.
Let’s not forget solar energy. As our planet battles the growing threats of climate change and environmental degradation, renewable sources of energy have become crucial. Solar power, driven by photovoltaic technologies, is not only sustainable—it’s also becoming increasingly affordable. It is lighting homes in rural areas, powering schools, and providing electricity to health clinics in remote regions. In many ways, solar light is restoring dignity, access, and hope to people left in the dark.
Light also connects deeply with health and medicine. Optical imaging techniques allow us to observe biological processes in real-time, helping to detect diseases like cancer at early stages. Ultraviolet light is used in sterilization and disinfection—something we became very familiar with during the COVID-19 pandemic. Light therapies are used to treat jaundice in newborns and seasonal affective disorder in adults. In fact, many modern hospitals cannot function without light-based equipment.
But light’s role is not limited to laboratories or clinics. It is equally present in education and communication. Fiber optics—the slender strands of glass or plastic that transmit light signals—carry the internet across continents, enabling global communication and learning. In classrooms, from the most advanced urban institutions to underfunded village schools, light enables students to read, explore, and grow.
Yet, despite these incredible innovations, let’s pause for a moment and recognize a painful truth: not everyone has access to the power of light.
According to recent estimates, over 750 million people around the world still live without access to electricity. For them, darkness begins at sunset. Without light, children cannot study, businesses cannot operate, clinics cannot function, and communities cannot progress. In such places, a simple solar lantern can make the difference between a child getting an education and dropping out of school.
This year, the International Day of Light also highlights the theme of using light to advance sustainable development and education. And that’s why this celebration is so important. It is not just about appreciating a natural phenomenon—it’s about mobilizing global awareness to bring light-based solutions to where they are needed the most.
Moreover, light has been an enduring symbol in cultures across the world. In nearly every tradition and religion, light represents truth, knowledge, hope, and renewal. In India, the festival of Diwali celebrates the triumph of light over darkness. In many Western traditions, candles symbolize remembrance and spiritual illumination. In Africa, lanterns represent unity and reflection. These are not mere rituals—they are collective human expressions of what light means to us on a deeper, philosophical level.
Light also plays a key role in art and architecture. Artists use light to evoke emotions, create depth, and tell stories. Architects design spaces based on the interplay of natural and artificial light. In photography, cinema, and virtual reality, light is central to the experience. It has even inspired poetry and music, painting and sculpture—each reflecting how light shapes our inner and outer worlds.
Now, let’s talk about responsibility. With great power comes great responsibility, and light is no exception.
One emerging concern is light pollution. Cities across the globe are becoming brighter, and while that may seem like a sign of progress, it has serious consequences. Excessive artificial lighting disrupts ecosystems, affects human sleep cycles, and wastes enormous amounts of energy. Light pollution also dims our view of the stars—disconnecting us from the cosmos and the natural rhythms of the Earth.
Sustainable lighting design, energy-efficient bulbs, and motion-sensitive streetlights can help reduce this burden. It is vital that urban planning includes lighting strategies that are both effective and ecologically responsible.
Let us also not overlook the digital divide. While light-based technologies have enabled the internet and global communication, billions still lack access. Without connectivity, many are excluded from education, healthcare, and economic opportunity. Bridging this divide through solar power, fiber-optic infrastructure, and innovation must be a global priority.
So where do we go from here?
We must promote education in optics and photonics. We must support policies that encourage sustainable energy. We must raise awareness about light pollution and energy equity. And most importantly, we must recognize light not just as a tool, but as a symbol—a symbol of equity, progress, and the human spirit.
As individuals, we can choose energy-efficient lighting. We can support organizations that bring solar energy to underdeveloped communities. We can educate children about the science and symbolism of light. As communities, we can demand smarter urban lighting and sustainable energy systems. And as global citizens, we must push for policies and investments that use light to lift people out of poverty and into opportunity.
In conclusion, on this International Day of Light, let us remember: light is everywhere—but its benefits are not. Let us be the catalysts who ensure that light reaches every mind, every home, and every heart.
Let light not only guide us, but unite us. Let it illuminate the path forward—not just with knowledge, but with kindness, responsibility, and action.
Thank you.