Archived posting to the Leica Users Group, 2001/07/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Tue, 31 Jul 2001, Mxsmanic wrote: > Juan J. Buhler writes: > > > Sometimes they keep a faint glow for a few minutes. > > I've never seen this. I suppose some of the old-style lamps with heated > filaments might continue to glow for an instant. Some phosphors might glow > briefly as well. I can't remember actually observing anything like this, > however, and it hardly seems like it would be any worse than the glow from an > incandescent lamp. It sounds like an urban legend, actually, like the old myth > about babies being blinded if you take a picture of them with a flash. I have never seen an incandescent lamp glow in the visible spectrum for more than a second or so after turned off. If you have one that does this, I believe you, although it's hard to imagine how the lamp could keep hot enough to glow without electricity. Urban legend or not, my bathroom light keeps glowing for a while. I just keep it off, with the door open while setting things up. > When you turn off an incandescent lamp (_especially_ halogen lamps), it radiates > in the infrared for a few minutes, too. Wouldn't that be just as much a > problem? No. I can *see* the glow in my fluorescent tube. j - -- - --------------------------------------------------------------------------- Juan J. Buhler | Sr. FX Animator @ PDI | Photos at http://www.jbuhler.com - ---------------------------------------------------------------------------