[Rockhounds] UV flashlights (repost)

Tue Mar 28 19:31:48 PDT 2017

So not so cheap in the end lol. Oh well less than a Way Too Cool.

Tim Fisher
Orerockon.com

-----Original Message-----
From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On
Behalf Of Doug Bank
Sent: Tuesday, March 28, 2017 6:06 PM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
Subject: Re: [Rockhounds] UV flashlights (repost)

The article I posted further down in this email has suggestions for quality
batteries. Apparently these are often counterfeited in China, so beware of
cheap ones. They still should work, but may not be 3400 mAh. They are quite
a bit heftier than AAs.

Sent from my iPad

> On Mar 28, 2017, at 7:51 PM, Cessna, Jeffrey T. Mr. (Fed)
<jeffrey.cessna at nist.gov> wrote:
> 
> Tim,
> 
> The flashlight being discussed takes 3.7 V 18650 Li-Ion batteries.  It is
larger than a AA. Apparently it is popular for LED flashlights. It also
seems to be what is stuffed into the floor of Tesla cars.
> 
> I ordered 3400 mAh rechargeable ones with a protection circuit built in. A
2200 mAh version can be had for a fair bit less than what I paid.
> 
> Jeff
> 
> -----Original Message-----
> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On 
> Behalf Of Tim Fisher
> Sent: Tuesday, March 28, 2017 5:08 PM
> To: 'Rockhounds at drizzle.com: A mailing list for rock and gem 
> collectors' <rockhounds at rockhounds.drizzle.com>
> Subject: Re: [Rockhounds] UV flashlights (repost)
> 
> So what are the batteries? I thought they were the rechargeable Lithium
AAs.
> 
> Tim Fisher
> Orerockon.com
> 
> -----Original Message-----
> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On 
> Behalf Of Cessna, Jeffrey T. Mr. (Fed)
> Sent: Tuesday, March 28, 2017 11:40 AM
> To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> Subject: Re: [Rockhounds] UV flashlights (repost)
> 
> Here are two of the posts with websites (you can of course find these on
the archive if you can get to it, it required special instruction while the
link was messed up).
> 
> I have a Convoy S2+ 365nm, a LW passing filter, and the special batteries
on the way. So far just the charger for the batteries has arrived. So, I
can't make any pronouncements yet. I did see one in action at our show
recently.
> Even with a filter it had more blue than I would like, but it was very
bright.
> 
> As one of the websites states, looking for Convoy is not enough. They make
other lights in the same housing. As a matter of fact, they will sell just
the housing for do-it-yourself.
> 
> Jeff
> 
> -----Original Message-----
> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On 
> Behalf Of Doug Bank
> Sent: Saturday, March 18, 2017 12:34 PM
> To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors 
> <rockhounds at rockhounds.drizzle.com>
> Subject: Re: [Rockhounds] UV flashlights
> 
> There is a new flashlight that the fluorescent mineral community is
buzzing about. It uses a Nichia 365nm LED that has very little visible light
leakage (so the rocks aren't real purple) and the wavelength is true (That
said, a filter is advisable). The really cool thing about it is that it is
CHEAP.
> The light can be bought for under $25, though you also need to add the
price for a good 18650 battery and charger and maybe $2 for a filter. While
it is long wave, it is REALLY bright, and can get a response from many short
wave minerals. Not a true response, but enough to show you that something is
fluorescent. You can find a lot more information here:
> 
> https://www.naturesrainbows.com/single-post/2017/03/01/365nm-Flashligh
> t-Torc h-The-Most-Significant-Innovation-in-UV-Mineral-Lights-in-Years
> 
> The only real problem with this light is that is seems to have few 
> sources, is shipped from China, and has a variable supply chain. Ditto 
> for the 20mm
> ZWB2 filters, which are out of stock in most places. The link above tells
you everything you need to know.
> 
> It is cheap, it is light, it is small. It can be easily taken anywhere.
The brand is also well known for quality among flashlight hobbyists. Get one
today.
> 
> Doug
> 
> PS Also the best cat pee detector I have ever used! :-(
> 
> -----Original Message-----
> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On 
> Behalf Of gene at fossilnut.com
> Sent: Saturday, March 18, 2017 12:06 PM
> To: 'Rockhounds at drizzle.com: A mailing list for rock and gem collectors'
> <rockhounds at rockhounds.drizzle.com>
> Subject: Re: [Rockhounds] UV flashlights
> 
> I would recommend getting one with a filter. There are several models
available. Here is one site that sells them.
> http://www.fluorescents.com/uvflashlights.html
> 
> Also consider a 405 nm Laser. Technically it is above UV.. barely, but the
intense power on the spot elicits some great responses with some minerals.
> 
> Gene
> 
> 
> 
> 
>> On Mar 18, 2017, at 10:37 AM, Peter Richards <rpr at heidelberg.edu> wrote:
>> 
>> Any comments about the best UV flashlight for mineral use, value for
> money?
>> 
>> Thanks,
>> Pete Richards
>> ___________________________
>> R. Peter Richards, Ph.D.
>> rpr at heidelberg.edu
>> Morphological Crystallographer
>> 
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