RIVER ROCK 2xC 1.5W LED FLASHLIGHT

River Rock 2xC 1.5W LED Flashlight, retail $~25.00 (www.target.com)
Manufactured by (Unknown) for River Rock
Last updated 08-14-07




This is the River Rock 2 C cell 1.5 watt LED flashlight. It uses a Nichia Jupiter high-powered LED, and has a convex (magnifying) lens to focus the beam into a type of "moon"-shaped beam - a circular beam with a sharp fall-off at its perimeter.

It comes in a mostly aluminum body, feeds its LED from two C cells, and has a pushbutton on/off switch on its barrel.

Because it uses just two cells, there is almost certainly a DC-DC inverter somewhere inside to boost the voltage from the ~+3 volts produced by the batteries to the +3.6 to +4.0 volts needed by that white LED. I attempted to use an oscilloscope to "see" the inverter, but the speed is faster than the decay time of the phosphor in the white LED, so I was not successful.


SIZE



Press the rubberised button on the barrel firmly until it clicks and then release it to turn it on.

Press and release the button the same way again to turn the flashlight on back off.

There is no momentary or signalling mode available in this flashlight when it's off, however you can blink the flashlight while it is on by partially depressing the button. If you don't mind the backward or reverse feeling of this, you can blink the flashlight this way if necessary.

The flashlight comes with a wrist strap, already affixed to the unit's tailcap via a hole in the side of the tailcap. This strap is large enough to go around the flashlight, so you can use this strap to hang the flashlight from thin tree branches, thin water pipes, or other long thin objects with no readily accessible "end".



To change the batteries, unscrew and remove the tailcap, gently place it on the ground, and kick it in the garden so the praying mantids will think it's something yummy to eat and subsequently strike at it...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the old used-up C cells out of the barrel and into your hand, and dispose of or recycle them as you see fit.

Slide two new C cells in the flashlight barrel, orienting them so their button-ends (+) positives go in first. Finally, screw the tailcap firmly back on.
Aren't you glad you didn't kick that tailcap into the garden with all those hungry, hungry praying mantids now?


Here is what a praying mantis looks like.
I found this guy on the morning of 09-08-06 clinging to the basket of my scooter.

Current usage measures 281.1mA on my DMM's 400mA scale.



This is a loaner. So I won't throw it against the wall, stomp on it, try to drown it in the toilet bowl or the cistern, run over it, swing it against the concrete floor of a patio, bash it open to check it for candiosity, fire it from the cannonada (I guess I've been watching the TV program "Viva Piņata" too much again - candiosity is usually checked with a laser-type device on a platform with a large display or with a handheld wand), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that flashlights may have inflicted upon them.
So this section of the flashlight's web page will seem a bit more bare than this section of the web page on a page about a flashlight that is not a loaner sample.

I performed that dreadful suction test on it, and it held a good partial vacuum, so it is highly weather-resistant and possibly even submersible to shallow depths as well.



Beam photograph on the test target at 12".
Measures 617,000mcd on a Meterman LM631 light meter.



Photograph of the beam on a wall at ~10'.


Those rectangular graphic things in the upper left quadrant of this photograph are marquees from:
Nintendo ''R-Type''
Super Tiger...er...uh...Konami ''Super Cobra''
Midway ''Omega Race''
Sega ''Star Trek''
Williams ''Joust''
Venture Line ''Looping''
Universal ''Mr. Do!'s Castle''
Jaleco ''Exerion''
Gremlin/Sega ''Astro Blaster''
Atari ''Tempest''
Gottlieb ''Q*bert''

upright coin-op arcade video games from the 1980s.

That graphic toward the right is:
A "BIG SCARY LASER" poster sent by www.megagreen.co.uk


And that clock to the right of the sign is an Infinity Optics Clock.


Spectrographic plot
Spectrometer plot of the LED in this flashlight.
Ocean Optics USB2000 Spectrometer on loan from WWW.TWO-CUBED.COM.


ProMetric analysis
Beam cross-sectional analysis.
Image made using the ProMetric System by Radiant Imaging.





TEST NOTES:
Test unit of this and four other products were loaned to me by a website fan on 08-12-07,
and were received on the afternoon of 08-14-07.

Product was made in China. A product's country of origin really does matter to some people, which is why I published it on this web page.


UPDATE: 00-00-00



PROS:



CONS:



    MANUFACTURER: Unknown
    PRODUCT TYPE: Medium handheld flashlight
    LAMP TYPE: White Nichia Jupiter LED
    No. OF LAMPS: 1
    BEAM TYPE: Medium spot w/sharp fall-off to extinction
    SWITCH TYPE: Pushbutton on/off on barrel
    CASE MATERIAL: Aluminum
    BEZEL: Metal; LED protected by plastic convex lens
    BATTERY: 2xC cells
    CURRENT CONSUMPTION: 281.1mA
    WATER RESISTANT: Yes
    SUBMERSIBLE: Yes, to shallow depths at minimum
    ACCESSORIES: 2xC cells, wrist lanyard
    SIZE: 6.8" L, 1.6" D
    WEIGHT: 12 oz (with batteries)
    WARRANTY: Unknown/not stated

    PRODUCT RATING:

    Star Rating





River Rock 2xC 1.5W LED Flashlight *






Do you manufacture or sell an LED flashlight, task light, utility light, or module of some kind? Want to see it tested by a real person, under real working conditions? Do you then want to see how your light did? If you have a sample available for this type of real-world, real-time testing, please contact me at ledmuseum@gmail.com.

Please visit this web page for contact information.

Unsolicited flashlights appearing in the mail are welcome, and it will automatically be assumed that you sent it in order to have it tested and evaluated for this site.
Be sure to include contact info or your company website's URL so visitors here will know where to purchase your product.


WHITE 5500-6500K InGaN+phosphor 
ULTRAVIOLET 370-390nm GaN 
BLUE 430nm GaN+SiC
BLUE 450 and 473nm InGaN
BLUE Silicon Carbide
TURQUOISE 495-505nm InGaN
GREEN 525nm InGaN 
YELLOW-GREEN 555-575mn GaAsP & related
YELLOW 585-595nm
AMBER 595-605nm
ORANGE 605-620nm
ORANGISH-RED 620-635nm
RED 640-700nm
INFRARED 700-1300nm
True RGB Full Color LED
Spider (Pirrahna) LEDs
SMD LEDs
True violet (400-418nm) LEDs
Agilent Barracuda & Prometheus LEDs
Oddball & Miscellaneous LEDs
Programmable RGB LED modules / fixtures
Where to buy these LEDs 
Links to other LED-related websites
The World's First Virtual LED Museum
Legal horse puckey, etc.
RETURN TO OPENING/MAIN PAGE
LEDSaurus (on-site LED Mini Mart)



This page is a frame from a website.
If you arrived on this page through an outside link,you can get the "full meal deal" by clicking here.