# How Smart Light Networks Coordinate Without a Central Controller

> A system where individual smart lights talk to each other to make lighting decisions based on sensors, rather than relying on a single master computer.

- **Patent:** US RE49480
- **Original title:** USRE49480E1 - Illumination control network
- **Owner:** Ideal Industries Lighting LLC
- **Granted:** 2023
- **Status:** Active
- **Times cited:** 0
- **Field:** consumer_electronics, telecommunications, energy

## What it does

This patent describes a lighting system where each light fixture acts as a small, independent computer. Instead of a central hub telling every light what to do, these lights share data about what they sense—like motion, sound, or ambient light—with their neighbors. By using a distributed processing method, they collectively decide how to adjust their brightness or patterns. For example, if one light detects a person walking down a hallway, it can signal nearby lights to brighten in anticipation of the person's movement, creating a responsive, energy-efficient environment.

## What it does NOT cover

- Does not cover lighting systems that rely exclusively on a central server or master controller to process all sensor data.
- Does not cover simple motion-activated lights that operate in isolation without communicating with other fixtures.
- Does not cover non-networked lighting systems that lack inter-device communication interfaces.

## The clever bit

The system uses a polling algorithm to weight stimuli across the network, allowing the lights to reach a consensus on illumination levels without needing a central brain to manage the logic.

## Real-world examples

1. Smart office lighting systems
2. Networked street lighting for smart cities
3. Adaptive warehouse illumination

## Why it matters

As buildings become smarter, the demand for energy-efficient, automated lighting has grown. This patent addresses the challenge of scaling these systems without creating a single point of failure or needing complex, expensive central wiring. It is relevant to the development of smart cities and intelligent office buildings where lighting needs to adapt to human behavior in real-time.

## Frequently asked questions

### What does How Smart Light Networks Coordinate Without a Central Controller cover?

A system where individual smart lights talk to each other to make lighting decisions based on sensors, rather than relying on a single master computer.

### Who owns patent US RE49480?

Ideal Industries Lighting LLC owns this patent, granted in 2023.

### When does this patent expire?

This patent is expected to expire on March 28, 2043, when the invention enters the public domain.

### What problem does this patent solve?

As buildings become smarter, the demand for energy-efficient, automated lighting has grown. This patent addresses the challenge of scaling these systems without creating a single point of failure or needing complex, expensive central wiring. It is relevant to the development of smart cities and intelligent office buildings where lighting needs to adapt to human behavior in real-time.

### What does this patent NOT cover?

Does not cover lighting systems that rely exclusively on a central server or master controller to process all sensor data.

**Full plain-English explainer:** https://patentbrief.org/patent/us/RE49480/google-assistant

**Original patent:** https://patents.google.com/patent/USRE49480

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._