On Mon, 20 Sep 1999 13:34:40 +1000 Gennette Bruce writes: >> > You're missing another point here - when mixing engineering >with >biology you have to remember that biology has (in most cases) found >the best >way to get *RELEVANT* information to the decision making area (brain). >*WHEN* the LED is getting 9mA is glows with a certain brightness that >human >eyes pick up and pass on to the brain where the brain checks against >how >bright it was *ABOUT* a thirtieth of a second ago; if it was about the >*SAME* then that's how the brain sees it. > > In other words biology *SEES* what in fact isn't there, but >because >it *IS* there *ENOUGH* it will appear to be bright enough, even though >an >engineering evaluation says it shouldn't be. > > Why don't you try it, then you'll see it works, even though >you're >sure it shouldn't. > > Bye. True, as I recall, a discussion here recently revealed that human vision seems to be peak sensitive instead of average sensitive, so low power but peaky light is seen as brighter than the same power but steady light. Over the years, I've just had too much trouble with unreadable displays, so my approach now is to "hit 'em hard." Perhaps I don't need to. Harold Harold Hallikainen harold@hallikainen.com Hallikainen & Friends, Inc. See the FCC Rules at http://hallikainen.com/FccRules and comments filed in LPFM proceeding at http://hallikainen.com/lpfm ___________________________________________________________________ Get the Internet just the way you want it. Free software, free e-mail, and free Internet access for a month! Try Juno Web: http://dl.www.juno.com/dynoget/tagj.