ELECTROSMOG MADE VISIBLE: Richard Box's FIELD
What if you could actually see the electromagnetic environment around you?
This remarkable artwork did exactly that.
One of the most striking visual demonstrations of electromagnetic fields ever created was FIELD, an installation by British artist Richard Box in 2004 while Artist-in-Residence at the University of Bristol's Physics Department.
The work consisted of 1,301 fluorescent tubes planted across a 3,600 m² field directly beneath 400 kV high-voltage transmission lines. The tubes, sourced from hospitals, were not connected to any power source. There were no wires, batteries or solar panels.
Yet they glowed.
At dusk, the field appeared to come alive with hundreds of softly illuminated tubes, creating a landscape that seemed almost supernatural. In reality, the installation was revealing a physical phenomenon that exists around us every day but normally remains invisible.
How Did the Fluorescent Tubes Light Up?
The answer lies in the powerful electric fields generated by high-voltage transmission lines.
Electricity transmission networks operate at extremely high voltages in order to transport energy efficiently over long distances. In the UK, major transmission routes typically operate at 400,000 volts (400 kV).
As alternating current flows through the conductors, it creates a strong alternating electric field between the cables and the grounded earth below. This electric field is invisible, but it contains energy.
Fluorescent tubes contain a small amount of low-pressure mercury vapour. When sufficient voltage is induced across the tube, the vapour becomes ionised and emits ultraviolet radiation. This ultraviolet light excites the phosphor coating on the inside of the glass, producing visible light.
The tubes used in FIELD were able to absorb enough energy from the surrounding electric field to glow without being physically connected to the electrical grid.
The effect was not as bright as a conventionally powered fluorescent tube, but it was bright enough to create a remarkable visual spectacle and reveal the presence of the invisible electric field surrounding the transmission lines.
Making the Invisible Visible
Most discussions about electromagnetic fields rely on measurements, graphs and technical explanations. Richard Box achieved something far more accessible.
He allowed people to see an electromagnetic phenomenon with their own eyes.
Standing within the installation, visitors could observe the physical effects of an electric field acting directly on the fluorescent tubes. Concepts that are normally confined to engineering textbooks became tangible and immediate.
The artwork demonstrated that the space surrounding electrical infrastructure is not empty. It is an active electromagnetic environment shaped by the movement and transmission of energy.
By transforming invisible physics into visible light, Box created a unique bridge between science, engineering and art.
Understanding Electromagnetic Fields
Electromagnetic fields (EMFs) are produced whenever electricity is generated, transmitted or used.
Natural electromagnetic fields have always existed. The Earth's magnetic field helps protect the planet from solar radiation, while lightning and solar activity also generate electromagnetic phenomena.
Modern society has introduced many additional sources, including:
- Electrical wiring
- Household appliances
- Power stations
- Electricity transmission networks
- Radio and television broadcasting
- Mobile phone networks
- Wi-Fi systems
- Bluetooth devices
- Satellite communications
Collectively, the mixture of human-made electromagnetic fields is often referred to as "electrosmog".
The term does not necessarily imply harm. Rather, it describes the complex electromagnetic environment created by modern technology.
Most of these fields are completely invisible and pass unnoticed by the vast majority of people.
Power Lines and Wi-Fi: Different Types of EMF
One of the most interesting questions raised by FIELD concerns how we perceive different forms of electromagnetic exposure.
Many people would hesitate to live directly beneath a major transmission line. The pylons are large and visually dominant. We can see the cables stretching across the landscape and instinctively appreciate the scale of the infrastructure.
At the same time, most homes contain multiple wireless devices operating continuously throughout the day.
Wi-Fi routers, smartphones, Bluetooth devices, smart televisions, tablets, laptops and smart home systems all rely on electromagnetic fields to transmit information.
The comparison between transmission lines and Wi-Fi is not straightforward because they operate very differently.
High-voltage transmission lines generate Extremely Low Frequency (ELF) fields at 50 Hz in the UK. These include both electric and magnetic field components and can be relatively strong close to the conductors.
Wi-Fi systems operate at frequencies measured in gigahertz, typically 2.4 GHz, 5 GHz and 6 GHz. They use much lower power levels and generate very different electromagnetic environments.
Directly beneath a major transmission line, magnetic field strengths may reach approximately 10 to 20 microtesla. By comparison, the magnetic component associated with Wi-Fi transmissions is generally tiny fractions of a microtesla and decreases rapidly with distance.
The technologies are different, the frequencies are different and the field strengths are different.
Yet both demonstrate the extent to which modern life depends on electromagnetic phenomena.
Why We Notice Some Fields and Ignore Others
What makes FIELD particularly thought-provoking is the question it raises about perception.
Why do some electromagnetic fields capture our attention while others barely register in our awareness?
Part of the answer may be visibility.
The pylon is visible.
The transmission line is visible.
The glowing fluorescent tubes make the electric field visible.
Wi-Fi signals are not.
Most people never see the radio waves carrying emails, video calls, streamed music, cloud data and wireless communications through their homes every second of every day.
The infrastructure exists, but it is largely hidden from our senses.
As a result, visible infrastructure often feels more significant than invisible infrastructure, even when both play essential roles in supporting modern life.
Why FIELD Still Matters Today
More than twenty years after its creation, FIELD remains one of the most elegant demonstrations of the invisible forces that underpin contemporary society.
Electricity networks, communications systems, wireless technologies and digital infrastructure all depend upon electromagnetic principles that most people rarely stop to consider.
Richard Box's installation encourages us to look beyond what we can immediately see and recognise the hidden systems that power, connect and shape our world.
Whether viewed as an artwork, a physics demonstration or a commentary on modern technology, FIELD remains a powerful reminder that some of the most important forces influencing our daily lives are invisible.
For a brief moment beneath a set of transmission lines, Richard Box made those invisible forces visible.
