EverLED Replacement Bulb Replacement, retail $TBA
Manufactured by LEDdynamics, Inc. (www.leddynamics.com)
Last updated 07-27-13

The EverLED is a special LED bulb you put in your already existing flashlight in place of the regular incandescent bulb. It is designed to fit in PR-base flashlights using 1 to 6 cells, and uses the flashlight's own reflector to project its beam.

The EverLED uses a 5mm white LED, and hidden away in the bulb base is a special circuit that feeds the LED exactly the amount of power it wants, regardless if you put it in a 2-cell Ray-O-Vac you might have in the garbage drawer in the kitchen, or a 6-cell Mag Lite you might have in the car trunk.

For the purposes of this page, and because it was handy at the moment, the EverLED bulb was installed in a Mag Lite (3x D cells). This flashlight has a smooth reflector (not textured or stippled), runs on 3 D cells, and has a (+) bulb nipple connection (see below).

Your EverLED comes in a hinged, clear plastic jewel-type box, which you might want to hang onto rather than throw away. The instructions that come with the EverLED can be folded back up and kept in this box if desired.

Since this will depend greatly on which flashlight you put it in, this section won't be of that much use.

Generally, you'll need to remove the flashlight head assembly so the PR-base bulb is exposed or can be removed. Remove the flashlight's bulb, and replace it with an EverLED. Then, reassemble the flashlight.

WARNING: If the tip (nipple or end) of the bulb is connected to the (-) negative pole of the batteries, you could let out all the magic smoke of your EverLED and cause it to quit working forever, and you don't want to do that. Please be absolutely, positively sure that the tip of the bulb is (+) positive in polarity before you put the flashlight all the way back together and throw the switch. For most barrel-type flashlights, the (+) button on the top battery touches the tip of the bulb - this is the way it ought to be. But some flashlights have the (-) flat side of the battery at the tip of the bulb, and you don't want that, unless you want to smoke your brand spanking new EverLED and watch that money whirling down a commode.

Because the battery changing procedure is different for just about every flashlight you can put an EverLED bulb in, this section will be skipped. Just don't put the batteries in backward. :-P

You aren't really supposed to throw it at a wall or step on it or run over it, so I won't have too many results for this section either. As I understand though, the EverLED is water resistant, so if it falls in the {vulgar term for feces}bowl, just fish it out, douche it off under the faucet, dry it off with some toilet paper, and install it in a flashlight where it *really* belongs. :-)

The performance of an EverLED bulb will depend on what kind of flashlight you put it in. I used a Mag Lite (3x D cells) for this page because I happened to have it handy at the moment. You can use it in any flashlight that uses standard PR-base bulbs, runs on 1 to 6 cells (1.5V to 9.0V), and most importantly, has the tip of the bulb going to the (+) positive nipple of its battery. I can't emphasise this enough - the bulb tip MUST be (+) positive, or you'll let all the magic smoke out of your EverLED and it'll stop working!

If you install it in a flashlight with a smooth reflector and the focus is just right, the EverLED should produce a narrow, spotlight-like beam, somewhat reminescent of a Turtlelite 1 but a heck of a lot brighter. There should also be a dimmer corona surrounding the hotspot. There may be some blotchiness of the hotspot; this is completely normal and does not in any way indicate a problem with the EverLED.

The EverLED can be used with a multitude of battery types, including heavy duty, alkaline, lithium, NiCD rechargeables, and NiMH rechargeables. Just be sure the voltage fed to your EverLED doesn't exceed 9 volts, and you'll be fine.

It incorporates something called "Power Squeeze" technology, to get the most power out of regular batteries, yet shut itself down before rechargeables become damaged. This level is around 0.9 volts per cell - when alkalines are considered "used up" and before rechargeables get damaged by overdischarge. I don't know how this circuit works, so please don't ask.

The light does appear white, but is SLIGHTLY more greenish than the light produced by a SureFire KL4 and an Arc LSH-P. But when used by itself, it does appear white and not greenish at all. Not in the hotspot, and not in the corona either. If you want that "rotten dog urine green" color, you won't find it in an EverLED bulb. They are all pre-tested, so you won't get that funny greenish color if you don't want it.

I think you'll get a "cleaner" beam from a faceted reflector flashlight, but your results may vary.

Beam photo (narrow focus) on the target at ~12".
Photograph was left deliberately uncropped to show beam details.
Measured 117,800mcd on an Amprobe LM631A light meter.

Beam photo (wide focus) on the target at ~12".
Photograph was left deliberately uncropped to show beam details.
Measured 11,870mcd on an Amprobe LM631A light meter.

Beam photo on a wall about 8' away.

Spectrographic analysis
Spectrographic analysis of the LED in this bulb.

Spectrographic analysis
Spectrographic analysis of the LED in this bulb; spectrometer's response narrowed to a band between 452nm and 462nm to pinpoint native emission peak wavelength, which is 457.170nm.

The raw spectrometer data (comma-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/42/everled.txt

USB2000 Spectrometer graciously donated by P.L.

Test unit was sent by an unknown OEM or retailer at an unknown time (though probably late-2004); it didn't turn up until 07-22-13 while I was looking for another product (which I never found).

UPDATE: 00-00-00

Fits in most PR-base flashlights
Uses flashlight's own reflector for beam shaping


Will get smoked if you hook it up backwards
Could have been brighter

    MANUFACTURER: LEDdynamics, Inc.
    PRODUCT TYPE: LED replacement lamp
    LAMP TYPE: 5mm white LED
    No. OF LAMPS: 1
    BEAM TYPE: Depends on the flashlight you install it in
    SWITCH TYPE: Depends on the flashlight you install it in
    CASE MATERIAL: Depends on the flashlight you install it in
    BEZEL: Depends on the flashlight you install it in
    BATTERY: 1 to 6 cells; AA, C, or D
    CURRENT CONSUMPTION: Unknown/unable to measure
    ACCESSORIES: Jewelled plastic storage case
    SIZE: 23mm L x 9mm Dia. (not incl. flange) x 13mm flange width
    WEIGHT: 1.90g (0.070 oz.)
    WARRANTY: Unknown


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EverLED LED Bulb Replacement * ()

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