Dan Michaels wrote: > > Roman wrote: > > >> And, of course, my 100W GE light bulbs always seems to > >> go pffffft right when I turn on the light switch. I am > >> sure that GE designs the cold resistance of the filaments > >> in such as way as to maximize the retirement payoff for > >> Jack Welch. > > > > > >Hi Dan, yep Jinx had an excellent chart of bulb > >life and voltage. I posted some calcs here a while > >back showing that in 240vac countries the 60w globes > >get 4x or more the startup current than in 110v countries, > >and why adding a 5% volts drop resistor gives almost > >infinite bulb life. > > > > Roman, fantastic, so 5% is all it takes? > > And I wonder - are the guys selling bulbs outside the US > mainly subsidiaries of american conglomerates like GE? > This would explain a lot. Ha ha! Remember their income comes from selling you replacement light bulbs... I measured some 60w 240vac bulbs here, their cold resistance was 50 to 60 ohms. You work it out! :o) -Roman -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body