How LiFi works
LiFi (short for Light Fidelity) uses LED lights that flicker on and off millions of times per second. It's far too fast for your eyes to notice, so the light just looks normal.
Those tiny flickers carry data, like a super-fast Morse code. A small sensor on your device reads the light and turns it back into internet.
In 2023, LiFi got its own official standard, IEEE 802.11bb. It sits in the same family as WiFi, which makes it much easier for device makers to build in.
LiFi vs WiFi
LiFi | WiFi | |
|---|---|---|
Uses | Light (visible or infrared) | Radio waves |
Speed | Up to 10 Gbps shown in 2026 demos; far higher in labs | Typically hundreds of Mbps to a few Gbps |
Range | One room; needs a clear path to the light | Whole home; passes through walls |
Security | Very hard to snoop: light doesn't leave the room | Signal leaks outside, so it needs strong passwords |
Interference | None with radio devices | Crowded in apartments, offices and airports |
Availability | Early: special devices and adapters | Everywhere |
The takeaway: LiFi won't replace WiFi. It's a fast, private add-on for places where radio is crowded or not allowed.
Where LiFi is showing up in 2026
Homes, through the window. pureLiFi's Bridge XC beams internet through window glass at up to 1 Gbps, so 5G home internet can be installed without drilling or a technician. A Flex version is due to ship later in 2026.
10 Gbps indoor networks. At MWC 2026 in Barcelona, pureLiFi demonstrated a LiFi setup reaching 10 Gbps.
Phones (coming). At CES 2026, pureLiFi showed a tiny LiFi module in a phone case. Phone makers are evaluating it, though no phone has it built in yet.
Mass-market routers. Taiwan's Askey picked pureLiFi technology for its 5G home units, with carrier testing planned for mid-2026.
Places where radio is a problem. Hospitals, aircraft cabins, factories and secure offices are natural fits, because LiFi doesn't interfere with sensitive equipment.
What's holding LiFi back
Line of sight. Block the light with your hand, a bag or a wall, and the connection drops.
No outdoor use. Sunlight and distance make it impractical outside, so it's an indoor technology.
Few devices support it. Most phones and laptops still need an adapter.
New infrastructure. Buildings need LiFi-enabled lights or access points installed.
That's why most experts see LiFi working alongside WiFi and 5G, not replacing them.
What it means for travelers
One day, you may get fast, private internet from the reading light above your plane seat or the lamp in your hotel room. Until then, LiFi only works inside a single room, so the moment you step outside, you're back on mobile data.
That's where a travel eSIM comes in. CloudOn keeps you connected in 190+ countries: install it before you fly, land already online, and skip airport SIM queues and roaming bills.
Get your travel eSIM at cloudon.app
FAQ
What does LiFi stand for? Light Fidelity. It's wireless internet that uses light instead of radio waves.
Is LiFi faster than WiFi? It can be. pureLiFi demonstrated 10 Gbps in 2026, and lab tests have gone much higher. Real-world speed depends on devices and setup.
Does LiFi work in the dark? Yes. It can use infrared light, which is invisible, or LEDs dimmed so low they look off.
Can LiFi go through walls? No. That limits its range, but it also makes it very hard for anyone outside the room to intercept.
Can I buy a LiFi phone? Not yet. Phone makers are testing LiFi modules, but no mainstream phone has it built in as of late 2026.
هل أنت مستعد للحصول على eSIM؟
تصفّح الباقات لأكثر من 200 دولة. اشترِ في دقائق، وثبّت في ثوانٍ.