opinion tech single source: IEEE Spectrum

The Illusion of Safety: When Brighter Isn't Always Better

Walking through Trafalgar Square on a cold London spring night, surrounded by the weight of history—Nelson’s statue, the National Gallery looming, St Martin-in-the-Fields nearby—you expect a certain atmosphere. You expect drama, perhaps some shadow. What you get is an overwhelming wash of light.

My friend Simon Thorp, a local lighting designer, measures it near Nelson’s spire: two lux. Comfortable enough for a stroll, certainly. But those two lux are ten to twenty times brighter than what a full moon casts onto the ground. We see each other fine; the CCTV signs assure us we are monitored. It feels safe.

It feels... Illuminated.

This feeling—this desperate push toward more light—is everywhere now, and it’s driven by something deeply ingrained in us: a fear of the dark. If darkness means danger lurks around corners, then logic dictates that maximum light equals maximum security. More light must be inherently better.

But this simple equation is failing spectacularly across our modern cities.

We talk endlessly about how fantastic LEDs are—energy efficient wonders that consume up to ninety percent less energy than old bulbs did. And they are efficient! That initial saving fuels rapid global adoption overnight.

Cities swap out aging infrastructure for sleek new LED fixtures designed to mimic classical brass and glass lamps from the nineteenth century, installing twentieth-century tech smack dab in historic plazas like Trafalgar Square.

Here lies the subtle betrayal: because LEDs became cheap and readily available, we bypassed implementing proper control mechanisms; we merely scaled deployment volumes upward aggressively. We exchanged one form of inefficient consumption for another—shinier blind usage—perfectly illustrating how convenience masks wasteful practice in motion.

We substituted dim obsolescence for brilliant overexposure without altering our core strategy for managing light pollution whatsoever.

The outcome is visual discordance: ornate gaslamp appearances battling abrasive blue bursts from contemporary units pointed indiscriminately instead of focused precisely where necessary. Ironically, increasing “poor quality” illumination doesn't enhance safety; per Thorp, it only convinces us we require even more such harsh light because our natural vision suffers impairment from excessive overhead or low glare creating distracting secondary shadows elsewhere.

Then there is the unseen toll extracted upon biological systems themselves. This fixation on maximal luminance incurs deep costs extending past mere property value assessments or lines of sight when factoring in human wellness and animal orientation alike—consider insect migrations derailed by relentless urban luminescence or our body clocks skewed by continuous blue spectral assault resulting in lowered melatonin levels and heightened risk profiles linked to inadequate rest periods and ongoing sickness developing within densely lit zones like London and Paris today built upon trends started centuries ago via municipal lighting expansions but refined globally using semiconductor chipsets solely dictated by unit cost reduction rates presently dominating markets throughout continents?

Such technological capacity exists within reach for precise modulation—beams adjustable dynamically, intensities tuned second-by-second relative to true necessity opposed to manufactured apprehension—yet we revert habitually to blunt volumetric flooding simply because installation proved simpler or marginally cheaper upfront compared to engineering it as thoughtful civic integration woven into metropolitan design plans desde cero?

That constitutes wasting immense capability veiled behind a facade of eco-consciousness supported chiefly by reduced kilowatt draws metrics alone.**