Hi Angela Moreno Nola, thank you for sharing your query.
You can rename your new router’s network name to exact previous router’s name and use the exact same password.
After rebooting the router and once the network is back up and running, you can power cycle your LIFX lights (power off, wait for 5 seconds, turn the lights back on).
Doing so, will ensure that your lights sync up to the new router.
In case you, do not want to use the same name and password for the router, another solution would be to reset your LIFX bulb and set them up all over again.
Hope this solves your query.
Please feel free to reach out to us for any further clarifications.
Happy smart living :)