Replied by KR (Rancho Cucamonga, CA) on 10/24/2008
Hi Lewis,
Haven't used the lamps with salt crystals but have used the salt pipe with success. It is based on an ancient salt solution called "Halotherapy" aka "Salt Therapy" or "Speleotherapy" which in summary is salt cave therapy. You can learn all you need to know in depth from http://www.saltrocks.org
Best Wishes!