26.12.2013
As of 10-10-07, I've been using a PC2000-ISA Spectrometer from Ocean Optics that I received several years ago, but that I didn't have a home for until now. Spectrographic analysis of the blue LED in the Laser LED Cannon; yet newer spectrometer software & settings used. Spectrographic analysis of the "violet" LED in the Laser LED Cannon; yet newer spectrometer software & settings used. Spectrographic analysis of the LEDs in the Mini Strobe spectrometer's response narrowed to a range between 440nm and 475nm. Spectrographic analysis of the LED in the Novelty Lanyard Light made for Scion; spectrometer's response narrowed to a band between 430nm and 480nm to pinpoint peak wavelength, which is ~455nm. Spectrographic analysis of the LEDs in the Forever Bright Christmas Lights (2) C6 blue LED "bulbs", longer wavelength, narrower graph to pinpoint wavelength. Spectrographic analysis of the LEDs in the Forever Bright Christmas Lights (2) C6 blue LED "bulbs", shorter wavelength, narrower graph to pinpoint wavelength.
The spectrometer's response band was narrowed to exclude the red laser line and the broadband fluorescence emission from the product's yellow body. Spectrographic analysis of a blue 10mm LED from GlowPanel 45 plant light; spectrometer's response narrowed to 440nm to 490nm.
Do you manufacture or sell an LED flashlight, task light, utility light, or module of some kind? Unsolicited flashlights, LEDs, and other products 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. 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. Spectrographic analysis of the LED in the Ultrafire WF-502B 3W Cree Flashlight; newest (01-13-13) spectrometer software settings used. The chart starts to fall off not because the LED became a DED (Dark-Emitting Diode), but because I pressed the wrong key on the keyboard when I attempted to perform a screen dump and then neutralised the power supply because I do not have a heatsink for the LED. Spectrographic analysis of the LED in the NLS; newest (01-13-13) spectrometer software settings used.
Spectrographic analysis of the LED in the Arc LS Premium; newest (01-13-13) spectrometer software settings used. This is a long page with at least 36 images on it; dial-up users please allow for plenty of load time.
It is made of metal and plastic - though primarily of metal, has four levels plus off, and features a warm white LED instead of the distinctly bluish white LEDs found in all other desk lamps that I've seen. The illuminator head is adjustable over a 180° range in the X-axis (horizontally) and a ~100° range (the instructional materials state "90°" but it's more like 100°) in the Y-axis (vertically), and the unit has a touch-sensitive switch that allows you to switch the unit on, cycle through its four levels, and turn it off. It operates from a "wall wart" AC adapter - so you never have to face dead batteries when you go to use it. The lamp is almost ready to use as soon as you unpack it; all that needs to be done is for you to take the large part of the AC adapter and plug it into any standard (north America anyway) 110 to 130 volts AC 60Hz household receptacle, and plug the plug on the end of the AC adapter into the receptacle for it on the back side of the lamp's base. If you place your finger on the switch panel and hold it there, the lamp automatically cycles through its four intensity levels, turns off, then repeats this process indefinitely (for as long as you place your finger on the button anyway). This product is AC powered, so I do not have to tell you which part to remove, carelessly toss into the {vulgar term for feces}bowl, flush away, and then rather emphatically tell you not to. This lamp is meant to be used as a desk lamp in a dry area, not as a flashlight meant to be carried around, thrashed, trashed, and abused. This product uses a lamp (a high-powered warm white LED) that contains no mercury or other heavy metals, so it's RoHS-compliant.


This photograph is of the upper surface of the lamp's base, showing the blue backlighted "OPTRON" graphic and the four yellow-green "intensity indicator" LEDs.
One thing that pisses me off about this lamp is that what I believe is at a normal desk height, part of the diffusing dome is visible, and glows quite brightly. This isn't enough of a pisser to make me want to stop using this lamp, but it *IS* noticeable. One simple way to eliminate this if you're easily distracted is to place the lamp in such a position that the illuminator head can be tilted down slightly so that the diffusing dome is no longer visible. I really do like this lamp, (plus the "fix" for the above mentioned issue is quite simple) and it is such a nitpicky thing that it is not likely to seriously affect my final rating very much. In fact, I replaced the incandescent desk lamp that used to be on my desk with this one, and I think it's doing an admirable job!!!
Dimming appears to be accomplished using a method called PWM (Pulse Width Modulation), in which the LED is fed pulses of high current with a period of "off" (no current) between pulses. Photograph of the lamp lighting up the pages of a *LARGE* book about used up old insulaters.
Photograph of an oscilloscope screen at the second-to-highest intensity setting (setting #3).
Spectrographic analysis of the warm white LED in this desk lamp (minimum intensity); newer spectrometer software & settings used.
Spectrographic analysis of the warm white LED in this desk lamp (maximum intensity); newer spectrometer software & settings used. Spectrographic analysis of the warm white LED in this desk lamp (minimum intensity); newest (01-13-13) spectrometer software & settings used. Spectrographic analysis of the warm white LED in this desk lamp (maximum intensity); newest (01-13-13) spectrometer software & settings used. This video on YourTube (of the above linked video) was furnished to me by the lamp's manufacturer; it was published here with his permission. A product's country of origin really does matter to some people, which is why I published it on this web page. The bulb in my 3-level incandescent desk lamp blew out, so I'm now using this lamp in its stead. That blue LED in the base has not actually gone totally out; it has simply dimmed drastically.
PHOSPHOR WHITE LEDS; SPECTROMETER'S RESPONSE BAND NARROWED TO PINPOINT NATIVE EMISSION BAND (Pg.
Spectrographic analysis of the LED in the Disposable Book Light; spectrometer's response narrowed to a band between 430nm and 470nm to pinpoint native emission peak wavelength, which is nm.
Spectrographic analysis of the white LED in the 8 in 1 LED Card; newest (03-25-12) spectrometer software settings used. I had to completely disembowel the unit (in order to expose the LED to my spectrometer) to obtain these spectra; it is otherwise too dim for this instrument. Spectrographic analysis of the blue LED in the 7-Mode Flashing LED Safety Strobe; newest (01-13-13) spectrometer software settings used.
Spectrographic analysis of the blue LEDs in the Crystal Blue Powers of 2™ Binary Clock; newest (01-13-13) spectrometer software settings used. Spectrographic analysis of the blue LEDs in the LED Flashing Sunglasses; newest (01-13-13) spectrometer software settings used. Spectrographic analysis of the blue LEDs in the Light Relief; newest (01-13-13) spectrometer software settings used. Spectrographic analysis of the blue LEDs in the Galileo Thermometer; newest (01-13-13) spectrometer software & settings used.


Spectrographic analysis of the LEDs in the Mini Strobe; newer spectrometer software & settings used. Spectrographic analysis of the blue LEDs in the Custom-Made LED Sign; spectrometer's response narrowed to a band between 430nm and 470nm to pinpoint peak wavelength. Unsolicited flashlights, LEDs, and other Color-Changing Twister Lights 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 Color-Changing Twister Light.
Spectrometer's response narrowed to a band between 445nm and 455nm to pinpoint native emission peak wavelength, which is 451.180nm. Spectrometer's response narrowed to a band between 570nm and 610nm to pinpoint peak wavelength, which is 594.244nm. Spectrometer's response narrowed to a band between 570nm and 610nm to pinpoint peak wavelength, which is 594.236nm.
Spectrometer's response narrowed to a band between 550nm and 650nm to show that queer little phosphor peak characteristic of LS 1 and 3 watt LEDs of this era. Spectrometer's response narrowed to a band between 460nm and 470nm to pinpoint peak native emission wavelength, which is 463.500nm. Spectrometer's response narrowed to a band between 450nm and 460nm to pinpoint native emission peak wavelength, which is 455.760nm.
Spectrometer's response narrowed to a band between 605nm and 615nm to pinpoint that queer little phosphor emission peak found in early 1W Luxeon Star LEDs, which is 611.690nm. 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 cannonata (I guess I've been watching the TV program "Viva Pinata" too much again - candiosity is usually checked with a scanner-type device on a platform with a large readout (located at Pinata Central), with a handheld wand that Langston Lickatoad uses, with a "pack-of-cards"-sized instrument that Fergy Fudgehog uses, and the cannonata (also located at Pinata Central) is only used to shoot pinatas to pinata parties away from picturesque Pinata Island), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that flashlights may have inflicted upon them.
The "OPTRON" graphic remains lighted even when the lamp itself is turned off; this serves two primary purposes. The pulses are spaced closely enough together that the light appears to be continuously on to the human eye.
Spectrometer's response narrowed to a band between 440nm and 470nm to pinpoint LED's native emission peak, which is 452.488nm. I successfully reassembled it after performing these analyses so, "no harm no foul" as they say.
Spectrometer's response narrowed to a band between 467nm and 477nm to pinpoint emission peak wavelength, which is 470.880nm. Spectrometer's response narrowed to a band between 455nm and 465nm to pinpoint emission peak wavelength, which is 458.930nm.
Spectrometer's response narrowed to a band between 460nm and 470nm to pinpoint emission peak wavelength, which is 464.560nm. Spectrometer's response narrowed to a band between 450nm and 480nm to pinpoint peak wavelength, which is 465.482nm. Spectrometer's response narrowed to a band between 440nm and 470nm to pinpoint peak wavelength, which is 455.377nm. Spectrometer's response narrowed to a band between 430nm and 470nm to pinpoint native emission peak wavelength, which is 450.080nm.



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