Sci-Park 'Lumos' LED Flashlight, retail (unknown) (
Manufactured by Sci-Park Corporation (
Last updated 07-02-14

The Lumos is a flashlight using Nichia's new NCCW022 SMD Power LED. (See my page on white LEDs to see what one of these LEDs actually looks like).
Well, OK...might as well just show you here and now...

This is the LED used in this flashlight.

The Lumos has two modes of operation: steady-on, and blink. These options are selected with a slide switch on the side of the flashlight body. It comes in a silvery plastic body; rectangular in profile, and in my opinion, the Lumos is pleasant to hold.


My flashlight had a small insulating strip in the battery compartment that needed to be removed; I'm not sure if yours will or not. If your flashlight has batteries but does not work, slide the battery door off, and pull out & remove the green strip from between the battery and the flashlight contact, and slide the battery door back on.

Assuming the batteries are installed and the insulater is gone, slide the switch on top of the flashlight body forward (toward the lens) to get light, and slide it backward (toward the flashlight's tail) to not get light. Things just don't get much easier than this - well, not flashlights anyway.

On the right hand side of the flashlight is a small black slide switch, with "I" and "II" embossed into the flashlight body. With this switch set to the "I" position (toward the back of the flashlight), the light will operate in continuous mode. With the switch set to "II" (toward the front of the flashlight), the light will operate in blink mode, blinking at about a 5Hz or 6Hz rate. This mode is useful for attracting attention.

To change the batteries in the Lumos, slide the battery door off, and throw it away. O WAIT, YOU'LL NEED THAT!!! So just set it aside instead. ;-)
Remove the used batteries, and dispose of or recycle them as you see fit. Install four new AAA cells, following the polarity diagrams embossed in the bottom of the battery compartment. The flat (-) negative side of the cell faces a spring, and the flat (-) negative side of the cell above it contacts the button (+) side of the other.
Slide the battery door back on (aren't you glad you didn't get rid of it now?) and be done with it.

Measures 478mA on steady-on mode.
I cannot measure blink mode, because it's - well - blink mode.

Advertised battery life is ~1.5 hours in steady-on mode, and ~5 hours in blink mode.
Your results may vary slightly from these figures; and I do not know what criteria they base their figures on.

According to the packaging shown on the Sci-Park website, the Lumos consumes 1.7 watts of power.

The Lumos feels very great in the hand, and the on/off switch is positioned right where your thumb will go when you grasp the flashlight. The way the Lumos flashlight feels in the hand is a definite plus it has going for it. The battery door *could* come off in your hand while switching the flashlight on; you'll want to be aware of this possibility when you use the Lumos.

The Lumos is not waterproof, and not very water-resistant either, so you'll want to keep it away from lakes, ponds, creeks, oceansides, puddles of tiger pee, snowbanks, tubs, toilets, sinks, fishtanks, or other places where water or water-like liquids might be found.

The underside of the Lumos shows a laser warning, but there's no laser in it. So if yours has this warning label, you may disregard it. The Nichia sticker you see in this photograph refers to the LED powering it.

IMPORTANT: Nichia does not actually make this light, Sci-Park Corporation does.

The Lumos has a small loop moulded in the tail end for attaching a lanyard, split ring, or strap of your choosing. None of these are included with the flashlight though, so if you wish to use them, you'll have to procure them elsewhere. This loop is made of plastic, so it could become broken if you reef on it. If it does become broken though, the electrical and optical function of this flashlight will not be affected in any way.

The Lumos uses an aspherical lens to produce its beam. I tried to scratch it with the tip of the blade of a Swiss army knife, and was successful. :-( So the lens is made of plastic, not glass.
(Would I really try to cut up a brand new flashlight?
You bet your sweet patootie I would, if it's in the name of science!)

Beam photograph at ~12".
Measures 119,000mcd on a Meterman LM631 light meter.

The Lumos has a pure, cool-white beam, with no purple,
yellow, or "rotten octopus urine green" anywhere in it.
The overall color temperature appears to be around 7,000K.

Spectrographic analysis
Spectrographic analysis of the LED in this flashlight.

Spectrographic analysis
Same as above; newer spectrometer software & settings used.

Spectrographic analysis
Spectrographic analysis of the LED in this product; newest spectrometer software settings used.

Spectrographic analysis
Spectrographic analysis of the LED in this product using the newest spectrometer software settings; spectrometer's response narrowed to a band between 430nm and 470nm to pinpoint native emission peak wavelength, which is 457.144nm.

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

USB2000 spectrometer graciously donated by P.L.

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

This is video on YourTube showing the flashing of the product.
The flashing is ***MUCH MORE*** regular in reality; this is because the camera's shutter works differently than the human eye does!!!

This clip is approximately 1.3890785679 megabytes (1,445,312 bytes) in length; dial-up users please be aware.
It will take no less than seven minutes to load at 48.0Kbps.

I cannot provide this video in other formats, so please do not ask.

Unit was received on 03-17-04.

The portion of the website describing this flashlight is in Japanese script-type characters, despite an "English" option presented on the main page. The page this flashlight is on does not appear to be linked via the English language portion. Run it through the translation matrix of your choosing, like Babelfish, if you cannot read Japanese.

UPDATE: 04-08-04
I've been using the Lumos as a bedside flashlight lately. It feels very nice in the hand, and produces decent light to boot.

UPDATE: 09-14-06
I really do like this flashlight, and as a result, I've decided to increase its rating from 3 stars to 3 stars.

Very bright for what it is
Uses new and innovative LED technology
Multiple operating modes

Not very water-resistant
Battery door could come off in your hand unexpectedly

    MANUFACTURER: Sci-Park Corporation
    PRODUCT TYPE: Handheld flashlight
    LAMP TYPE: Nichia Power LED, model NCCW022
    No. OF LAMPS: 1
    BEAM TYPE: Circular, sharply defined with brighter hotspot and dimmer corona
    SWITCH TYPE: Slide switch on/off on top of flashlight body
    BEZEL: Lens recessed in plastic hosel
    BATTERY: 4 ea. AAA cells
    CURRENT CONSUMPTION: 478mA in steady-on mode
    WATER- AND PEE-RESISTANT: Very light spash-resistant only
    ACCESSORIES: 4x AAA cells
    SIZE: 22mm high by 32mm wide by 120mm long
    WEIGHT: 90 grams, fully loaded
    WARRANTY: Unknown/not stated


    Star RatingStar Rating

Sci-Park LED Flashlight *

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