Not really sure what you mean by red kelp. If I'm not mistaken kelps are in the class of brown algae and mostly temperate/coldwater. There are plenty of red algaes you could be referring to, and they generally aren't too hard to care for. Lighting would be the same as the green algaes pretty much, but whichever species you're referring to probably does not grow as fast as things like chaeto or caulerpa.