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For a LN node, especially if is a public node, is better to have full sync. But if you run it on a limited machine, you could use those mentioned methods. LN only needs to link to a source of blocks to verify and sync the graph and txs. Nothing else.
Also if you have a private LN node, you don't really need to run a full BTC node and a LN node. Check my guides about private LN nodes: https://darthcoin.substack.com/p/private-lightning-nodes
Good So i can self custody without downloading hundred of Gbs
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exactly. I wrote several guides about these scenarios on my substack (over 60). Please take your time and read them.
I am not saying that running a full node is not good, but contrary. But also depends in which situation. Not always you need to run a full node.
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