`  == (New Topic): Do Lightsticks Fade By ``Half-Life``? ==  On a completely unrelated topic, one thing I'd love to see addressed in the article on lightsticks (at []) is the manner in which the light from a Lightstick fades.  When green-colored Cyalume(tm) Lightsticks first came out, I remember reading on the package that they ``glowed with the brightness of a flashlight for the first six hours, and with the brightness of a night-light for the next six hours``, or similar verbiage (this was years ago, and my memory is not exact, but that was the gist. I definitely remember the brightness of the second six hours being compared with a night light). From personal experience, this fade-off is both gradual and steady.  But it's the verbiage itself that fascinates me: it seems to me that the one phrase which the company went out of its way to avoid using, was ``half-life.`` That's understandable  the term is so thoroughly associated in the public perception with nuclear radiation that its usage in this context would surely have been the Kiss of Death to any marketing campaign. Nonetheless, it seems clear to me that the light indeed does fade according to the half-life principle. One thing which the half-life principle dictates is that the ``radiation``  only photons only in this case  can never totally fade to zero, and indeed, in a dark room, a Lightstick can be seen to be still glowing, albeit very faintly, even after a couple of DAYS!  I'd love to see mention or discussion of this ``half-life`` fading within the main article, provided that someone  anyone  can obtain verification of and/or a confirmatory reference to it (not me, folks: I wouldn't even BEGIN to know where to look).     `