diff --git a/ansible/inventories/devnet-0/group_vars/bootnode.yaml b/ansible/inventories/devnet-0/group_vars/bootnode.yaml
index fda7468..9b93e5c 100644
--- a/ansible/inventories/devnet-0/group_vars/bootnode.yaml
+++ b/ansible/inventories/devnet-0/group_vars/bootnode.yaml
@@ -39,31 +39,29 @@ bootnodoor_container_env:
 
 # role: ethpandaops.general.ethereum_node
 ethereum_node_el: geth
-ethereum_node_cl: teku
+ethereum_node_cl: lighthouse
 ethereum_node_cl_validator_enabled: false
 
-# role: ethpandaops.general.teku
-teku_container_name: beacon
-teku_container_image: "{{ default_ethereum_client_images.teku }}"
-teku_container_env:
+# role: ethpandaops.general.lighthouse
+# Same pinned lighthouse as the validator nodes: the only CL tested on this config
+# (stable teku cannot start on a Gloas genesis). --archive keeps every state, as the
+# teku ARCHIVE mode did, for xatu-cannon and dora.
+lighthouse_container_name: beacon
+lighthouse_validator_container_name: validator
+lighthouse_container_image: "{{ default_ethereum_client_images.lighthouse }}"
+lighthouse_container_env:
   VIRTUAL_HOST: "{{ ethereum_node_beacon_hostname }}"
   VIRTUAL_PORT: "{{ ethereum_node_cl_ports_http_beacon | string }}"
   LETSENCRYPT_HOST: "{{ ethereum_node_beacon_hostname }}"
-teku_container_volumes:
-  - "{{ teku_datadir }}:/data"
-  - "{{ teku_auth_jwt_path }}:/execution-auth.jwt:ro"
+lighthouse_container_volumes:
+  - "{{ lighthouse_datadir }}:/data"
+  - "{{ lighthouse_auth_jwt_path }}:/execution-auth.jwt:ro"
   - "{{ eth_testnet_config_dir }}:/network-config:ro"
-teku_container_command_extra_args:
-  - --network=/network-config/config.yaml
-  - --genesis-state=/network-config/genesis.ssz
-  - --p2p-peer-upper-bound=100
-  - --data-storage-non-canonical-blocks-enabled=true
-  - --data-storage-mode=ARCHIVE
-  - --logging=info
-  - --Xlog-include-p2p-warnings-enabled
-  - --metrics-block-timing-tracking-enabled
+lighthouse_container_command_extra_args:
+  - --testnet-dir=/network-config
+  - --archive
   - >-
-    --p2p-discovery-bootnodes={{
+    --boot-nodes={{
       (
         (
           groups['bootnode']