How to tell if Lightning nodes are lnd, c-lightning, eclair I am performing some experiments on the Lightning Testnet Network. I would like to perform the experiment on the 3 main lightning implementations, for which I would like to be able to connect and open a channel with an lnd, c-lightning and eclair node. 


Is there a list of lnd, c-lightning, eclair nodes that are announced? even if just in testnet?
Is there a way of knowing this?
As far as I know there is no way of knowing this on a protocol level... What you could do is to set up your own nodes (each node with a certain implementation) or some people say publicly which nodes they run. For example my node is c Lightning, ACINQ is using eclair and I believe rompert is running on lnd.
Also on 1ml.com some owners register their nodes and tell what they are running. Of course they could lie...