I thought it was called "Lightning Inferno"

You're not alone bud ;) I thought it was a mistake too. But Blizz officially says it is the Red Lightning Hose. That's Blizz for ya :D "The Diablo Wiki needs you 4L!!!", Mobokill 08:06, 24 December 2008 (UTC)

The offical game guide does call it Lightning Inferno, but the website says Red Lightning Hose

Community content is available under CC-BY-SA unless otherwise noted.