Hi @BrookeNASA,
Welcome to the Roku Community!
We understand that the controller of your Roku Smart Light Strip+ SE is lost. We'd be happy to provide you with further details about this matter.
We want to make it clear that the controller isn’t available for individual purchase. It comes bundled with the Roku Smart Light Strip+ SE, so you’ll have everything you need to start enjoying your lighting experience right away.
Thank you for your understanding.
Cheers,
Riamie
Riamie D.
Roku Community Moderator