Urban Natural Light Transmission System

In dense urban environments — high-rise offices,
basement workspaces, interior apartments — artificial
lighting runs 24 hours a day because natural light
simply cannot reach. This costs energy, money, and
has measurable negative effects on human health,
productivity, and wellbeing.

Booster Deep Tech’s urban light transmission system
solves this with an elegantly simple chain:
collect → collimate → transmit → disperse.

How It Works

Collection: A dish collector (starting at 1 metre
diameter) is mounted on the rooftop or terrace.
Outdoor sunlight on a typical day in India delivers
tens of thousands to hundreds of thousands of lux —
far more energy than needed.

Collimation: The collected light passes through a
unique light collimator design developed by the
inventor. This compresses the wide-diameter input
beam into a narrow, parallel, high-intensity beam —
typically from 1 metre diameter down to 10 cm —
while preserving the light’s natural spectrum and
quality.

Transmission: The collimated beam travels down
through the building via a light guide — floor by
floor, reaching spaces with no windows and no
external light access.

Dispersion: At the delivery point, the beam is
dispersed through a diffuser, spreading natural
light across the interior space at 500 lux per
square metre — the standard recommended illuminance
for reading and working environments.

The Numbers

A standard 1-metre diameter dish collecting terrace
sunlight, operating at just 20% optical efficiency,
delivers enough light to illuminate a meaningful
working area at full natural spectrum — replacing
artificial lighting completely during daylight hours.

No electricity consumed. No blue-light exposure
from LED or fluorescent sources. Full-spectrum
natural light — the same quality as standing next
to a window — delivered to the deepest interior
of a building.

Recognition

This technology was selected for incubation at
IIT Hyderabad — validating both the technical
feasibility of the collimation approach and the
commercial opportunity in India’s rapidly growing
urban building stock.

The same collimation technology that underpins
this system is also the foundational concept
behind the Space-Based Solar Power architecture
— demonstrating how one core innovation can
scale from a single building to an interplanetary
energy grid.