Back at my old club in Boston, someone gave us a talk about the technology of those lamps. In essence, much of the energy is shifted down from near ultraviolet (somehow). The light is quite strong in the blue spectrum, so you have to be very careful if plan on observing. -----Original Message----- From: Chuck Hards <chuckhards@yahoo.com> Sent: May 28, 2004 10:04 AM To: Utah-Astro <utah-astronomy@mailman.xmission.com> Subject: [Utah-astronomy] LED lanterns I finally took the plunge and bought some LED camping lanterns from Sportsmans Guide. They have 2 models, a standard-size lantern with 30 ultra-bright white LEDs, running on D batteries, and a mini size with 12 LEDs, running on AA batteries. Each will run for days and days, continuously, on a single set of batteries. Weeks to months if used intermittantly. They are very bright, comparable to a similarly sized gas-mantle lantern without the combustion byproducts and need for volatile fuel. Plenty of light for those cloudy night activities at the campsite. Now I need take only fossil fuel for cooking needs. I highly recommend these LED-type lanterns over those powered by fossil fuels. I'd even give them an edge over flourescent lanterns due to their smaller power requirements. __________________________________ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger. http://messenger.yahoo.com/ _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.utahastronomy.com