LumaHarvest
LOW-LIGHT ENERGY HARVESTING
Low-Light Harvesting
Energy awakened from shadows
LumaHarvest · by YeeMion Tech
CHAPTER 01
What is Low-Light Harvesting
In low-light indoor environments (50–500 lux), specialized photovoltaic panels convert scattered and artificial light into electricity. Managed by a CMIC smart controller, the energy is stored in a solid-state capacitor, providing continuous, low-maintenance power for low-energy devices.

It's not a miniaturized version of traditional solar — it's an entirely new energy language.
CMIC
CHAPTER 02 · THE CHALLENGE
1/1000Indoor light intensity is only one-thousandth of outdoor
200 lux
Typical indoor light
↓ 80%
Traditional PV efficiency drop
0.62
kgCO₂e/kWh grid emission factor
CHAPTER 03 · CHRONICLE
Tech Chronicle
1839
Becquerel
Photovoltaic effect discovered
1954
Bell Labs
First silicon solar cell
2000s
a-Si Thin Film
Indoor spectrum matching
2019
Perovskite
Low-light efficiency breakthrough
2024
CMIC LS6821
Smart energy management chip
CHAPTER 04 · THE BRAIN
The Control Hub: CMIC
The LS6821 from Lingsi Semiconductor is a Configurable Mixed-Signal IC (CMIC) that integrates light-sensing signal conditioning, decision logic, and storage management — the intelligent brain of the low-light harvesting system.
LS6821
Light-Signal Conditioning
Built-in high-precision ADC, matched to the weak-signal characteristics of a-Si / CIGS indoor PV panels
Decision Logic Unit
Configurable logic block (CLB) for MPPT tracking, charge/discharge strategy, and device wake-up sequencing
Storage Management
Drives solid-state capacitor charging, low-voltage detection and over-discharge protection, supports 1.8V–5.5V wide-voltage operation
Chip Model
LS6821 DFN-8 package
Operating Voltage
1.8V – 5.5V wide range
Sleep Power
< 1 μA ultra-low power
CHAPTER 05 · THE COLLECTOR
The Collector
The indoor PV panel uses a-Si amorphous silicon thin film, whose spectral response peak precisely covers the 400–700nm range of LED and fluorescent lighting. Even at 200 lux, it can output 4.5V / 50μA of usable power.
200 lux
Minimum operating illuminance
400-700nm
Spectral response range
50μA
Typical output current
INDOOR PV Vout 4.5V
CHAPTER 06 · THE RESERVOIR
The Reservoir
Solid-state capacitor vs. traditional lithium-ion battery
Solid-State Capacitor
100,000
+ cycles
Charge/discharge cycle life
vs
Lithium-Ion Battery
500
cycles
Charge/discharge cycle life
No frequent replacement · Low maintenance · Minimal battery waste over lifetime
CHAPTER 07 · THE PRODUCT
Motion Night Light
The ultimate expression of low-light harvesting technology. By day, the PV panel collects ambient light energy; by night, the solid-state capacitor releases stored power to illuminate a soft night light. A 24-hour continuous energy loop — no frequent active charging, no plugging in.
200 lux
Min. activation
24h
All-day operation
No replacement
Maintenance-free
Day · Energy Harvesting Night · Energy Release 24H ENERGY LOOP
CHAPTER 08 · THE DATA
The Data Speaks
Daily energy balance · 24-hour cycle
100μA 50μA 0 06:0012:00 18:0000:00 06:00 Energy Income Energy Spend Sunset
365 days
Year-round operation
< 0.1 kWh
Annual energy use
Fewer batteries
Low-waste design
The Future is Here
Every lamp, a self-sufficient planet.
Drawing light from shadows, bringing warmth to the dark.
LumaHarvest · by YeeMion Tech · Low-Light Energy Harvesting