Well darn!!! I tried again and it linked for me...I don't understand...

Well in lieu of that try this...www.durst-pro-usa.com/

When the site opens, click on "enter", then on the next page click on "site map". When "site map" opens scroll down to technical information and select the article on condensor light sources (new)...this will take you to where the article begins...follow it from there.