It also includes other versions/brands of Uranium Glass, such as Jadite. That encompasses Vaseline (generally a yellow or yellow-green glass in daylight that glows bright green under black light) as well as Green Depression Glass that glows bright green under black light. For this subreddit, "Uranium Glass" encompasses all glassware that emits a distinct green glow under a black light. Moreover, different countries may also have slightly different definitions. There are many descriptors in use by collectors, including Vaseline and Depression Glass. The world of uranium glass can be very confusing - for both novices AND seasoned collectors. Otherwise, modern uranium glass is now mainly limited to small objects like beads or marbles as scientific or decorative novelties." Most such objects are now considered antiques or retro-era collectibles, although there has been a minor revival in art glassware. Uranium glass was once made into tableware and household items, but fell out of widespread use when the availability of uranium to most industries was sharply curtailed during the Cold War in the 1940s to 1990s. The proportion usually varies from trace levels to about 2% by weight uranium, although some 20th-century pieces were made with up to 25% uranium. "Uranium glass is glass which has had uranium, usually in oxide diuranate form, added to a glass mix before melting. As soon as the light shuts down or blinks due to low voltage, the cells should be removed from the light to prevent a small parasitic current from further depleting and damaging the cells over a prolonged period of time.Suggested subreddits! Check these out, please message the mods with suggested additions. Thisis good, because it shouldn't draw voltage on the rechargeable 16340 Li-ion cells down to an unsafe level - assuming the cells are pretty well matched. At 5.5 Volts, the light shut down and would not come back on until voltage was removed and then re-applied with at least 5.8 Volts. It maintained a very consistent 7.5 watt draw from 8.3 Volts down to 5.6 Volts, with current draw increasing as voltage dropped. Voltage was measured at the head and the head was "pre-heated" to a typical operating temperature by running it for 10 minutes first. Using a programmable power supply, I ran a test of input voltage versus current draw to characterize the module. I'm very pleased with the performance so far. I received the Convoy C8 "Firefly" flashlight from Mark Cole that Rhett Peterson plans to sell. No comparison to the Convoys being offered today. The beam power, intensity, throw are all simply amazing. The head gets hot allowing it to cool will extend the life of the LED. (Note: as with all LED flashlights, it is preferable to allow the light to cool periodically. This light will run as long as the charge of the lithium batteries holds (about 45 minutes) - with no degradation of power output (unlike today's Convoys). The head of the light is much larger - needed for the heat generated by the LED. I prefer it as has much better throw and reflectivity. The standard reflector is smooth (not orange peel). Two CR123 batteries (rechargeable ones - higher voltage required) Convoy C8 host (just a little bigger than a normal Convoy - the gray light shown next to the C8 host to show relative size) ($11)Ī 1500ma buck driver driven at 7.4v - $5, (w/ the two CR123/16340 rechargeable batteries shown, or optionally two 18650 batteries)
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