# The Lightning Network

Lightning is a network of payment channels on top of Bitcoin. Payments settle in seconds for tiny fees without a new on-chain transaction each time.

Canonical page: https://mybitcoinexplorer.com/learn/lightning-network
Topic: Lightning Network
Published: 2026-10-29
Updated: 2026-10-30


## Why Lightning exists
On-chain Bitcoin settles about every 10 minutes and block space is limited. That's great for final settlement but slow and costly for buying a coffee. Lightning moves most payments **off-chain**, while still using Bitcoin's security.

## Channels
Two people lock bitcoin into a shared on-chain output: a **[payment channel](https://mybitcoinexplorer.com/learn/payment-channels)**. They can then pay each other back and forth instantly by signing new balance updates, without touching the blockchain.

> Diagram: Payments shift the channel balance instantly, without on-chain transactions — Alice:Bob

## A network of channels
You don't need a channel with everyone. Payments **[route](https://mybitcoinexplorer.com/learn/lightning-routing)** through other people's channels, secured so that intermediaries can't steal the money. See [HTLCs: hash time-locked contracts](https://mybitcoinexplorer.com/learn/htlc).

> Diagram: A payment routed from Alice to Bob through two intermediaries — Alice,Carol,Dave,Bob

## Trade-offs
| Strength | Limitation |
|---|---|
| Payments in seconds | You need channel [liquidity](https://mybitcoinexplorer.com/learn/channel-liquidity) |
| Fees often a few sats | Your node should be online, or use a [watchtower](https://mybitcoinexplorer.com/learn/closing-channels-and-watchtowers) |
| Many payments leave no on-chain trace | Opening and closing channels cost on-chain fees |
| Amounts down to millisatoshis | Large payments may struggle to find a route |


## Lightning vs on-chain Bitcoin
| | On-chain | Lightning |
|---|---|---|
| Speed | About 10 minutes per confirmation | Seconds |
| Fees | Depend on block space demand | Usually a few sats |
| Best for | Savings, large amounts | Small, frequent payments |
| Record | Public blockchain | Only channel opens and closes are on-chain |
| Smallest amount | 1 sat (dust limits apply) | 1 millisatoshi |

## Getting started
Install a Lightning wallet, receive a small amount, then pay a Lightning invoice. Many wallets manage channels automatically so you never see them.


## Key takeaways

- Lightning moves payments into off-chain channels secured by Bitcoin.
- Payments route across channels via intermediaries.
- It's fast and cheap, but needs liquidity and online nodes.

## Common questions

### Is Lightning a different coin?

No. It uses real bitcoin locked in on-chain channels.

### Do I need to run a Lightning node?

Not necessarily. Many mobile wallets manage channels for you, some custodially. Running your own gives full control.

### Is Lightning safe?

Funds are secured by Bitcoin contracts, but you or a watchtower must watch for cheating, and wallets are newer and more complex than on-chain ones.

### Can Lightning payments be traced?

They leave far less public trace than on-chain payments, though channel opens and closes are visible on the blockchain.

## Related lessons

- [Payment channels](https://mybitcoinexplorer.com/learn/payment-channels)
- [Lightning routing](https://mybitcoinexplorer.com/learn/lightning-routing)
- [HTLCs: hash time-locked contracts](https://mybitcoinexplorer.com/learn/htlc)
- [Lightning invoices](https://mybitcoinexplorer.com/learn/lightning-invoices)