LED Flashlights

Keychain Flashlights

Emergency Food

Pocket Flashlights

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Keychain Flashlights

LEDs - Gallium Indium Nitride UV, violet, purple, blue, aqua, turquoise, green, white. Also Gallium Arsenide and others. New LED MUSEUM! GaN, InGaN, SiC, GaAs, GaP, GaAlP, ZnSe, flashlight, flashlights.

Ocean Optics USB2000 Spectrometer donated by P.L.
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.
As of 03-08-08, I once again have the USB2000 spectrometer, enabling color spectra again.
PC2000-ISA spectrometer used for NIR LED analyses graciously donated by Ocean Optics
As of 09-19-09, I no longer have the PC2000-ISA; it was sold to prevent an eviction.


Spectrographic analysis
Spectrographic analysis of the NIR LEDs in the Light Relief; newest (01-13-13) spectrometer software settings used. Spectrometer's response narrowed to a band between 830nm and 840nm to pinpoint emission peak wavelength, which is 833.920nm.

The raw spectrometer data (comma-delimited that can be loaded into Excel) is at

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

Please visit this web page for contact information.

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.
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