HI Can anyone explain what is really a "ballast" ? I saw some circuits that mention it as "choke" and sometimes as a "transformer"...my non-technical dictionary refer to it as something not relevant to electric.. what is exactly? when to use that word & regard to what? Thanks Tal -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body