I'd hate to see lasers banned from the GCSP. They are such a helpful tool for teaching the public about constellations and the stars. I believe it would be better to determine and distribute a set of guidelines for laser usage, so that everyone is aware of them, rather than just generate an outright ban. I think you would find that the average green laser user at a public star party is pretty aware of the responsibilities that go along with owning a green laser. If it turns out that someone is using a laser in an annoying way, simply letting the person know this should be quite enough to discourage them from continuing that behavior. As far as higher laser powers are concerned, most people only own one green laser. Generally, these are not adjustable (OK, I have one that is). The higher power output lasers are generally not a problem during twilight and early evening, but can be a problem once full darkness is reached. Rather than placing output milliwatt limitations on green lasers at star parties, I suppose you could find a way to limit the current to the IR diode inside the laser. This should reduce the laser output. The Optotronics laser that I own has a multi-position switch built in which does this exact thing, allowing the selection of different resistances in series with the IR diode to provide the desired power output. This may sound complicated, but the easiest way to do this is to use a set of not-quite-fresh batteries. This also happens on colder evenings when the laser and batteries do not operate as efficiently. I believe it may be possible to make a small disk of a low-resistance material, about 1/8" to 1/4" thick and the same diameter as a AAA or AA battery, that could be inserted in series with the batteries, thus limiting the current and the laser's output power. This material would have a very low resistance, of maybe just a few tenths of an ohm. I'll see what I can come up with, and put it on the forums. I will have to experiment with different materials, but the first thing that comes to mind is a cross-section of a simple 1-watt low-ohm resistor. I've got these in my parts box. Doing all of this would allow high-power laser owners to drop down the laser power so that they could continue to use their laser without causing interference with others around them. I know there was a reaction to the green laser incident (blinding of airline pilots) on the east coast, resulting in some star parties banning green lasers. This may be why there are no lasers allowed at Bryce Canyon. I'd like to see these decisions re-evaluated, now that additional information has become available regarding these types of incidents. Even with our telescopes and other equipment, the simple tool of the green laser is a powerful way to help people connect with the night sky. I'm sure we have all experienced this in our workings with the public. Our use of this 21st century marvel will allow us to continue helping everyone to keep looking up. George -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.