Using Lightning in practice

The lightning network moves bitcoin through payment channels, so payments settle in seconds and fees are often tiny. Here is how it looks for a user.

Paying

The receiver shows a lightning invoice as a QR code starting with lnbc. You scan it, check the amount, and pay. An invoice usually expires after an hour and can be paid once.

Reusable payment codes exist: BOLT12 offers (lno…) and Lightning addresses that look like name@domain.com.

Types of Lightning wallet

• Custodial: the company runs the channels and holds your funds. Easiest, but "not your keys" applies, and some may require kyc.
• Self-custodial mobile: you hold a seed phrase; the app manages channels, often through a service provider. A fee may apply to open the first channel.
• Your own node: full control, but you manage liquidity and backups yourself.

Good to know

• Small amounts: Lightning suits everyday spending; savings belong on-chain in cold storage.
• Receiving needs capacity: a channel can only receive up to its inbound liquidity. Good wallets handle this automatically.
• Backups: channel states need backups beyond the seed in some wallets. Read your wallet's recovery guide.
• Failed payments: if no route is found, the money stays with you.

When to use what

Takeaway

Lightning makes bitcoin practical for small, instant payments. Pick custodial or self-custodial knowingly.