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SUNLIGHT SL-2 SOLAR
POWERED FLASHLIGHT
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Somebody set up us the bomb.

SunLight SL-2 Solar Powered Flashlight, retail $39.00 (www.sunnightsolarstore.com...)
Manufactured by SunNight Solar (www.sunnightsolar.com)
Last updated 06-24-13

The SunLight SL-2 solar-rechargeable flashlight/area light is a flashlight that is not only recharged by light (indoors or outdoors) {you never, ever have to purchase disposable batteries for it!!!} and functions as a flashlight with three intensity levels, but it also functions as a room (area light) - also with three intensity levels. And to add to that, it can easily be set to turn itself on & off ("remembering" the setting it was on) so that it can also be used as a fully autonomous marker or path light outdoors.

It comes in a large red (or camouflage) ABS plastic body, and it has an O-ring or gasket on the barrel just behind the bezel (head) made out of a GITD (glow-in-the-dark) compound. It has six 5mm white LEDs for flashlight use, and three wide-angle 7mm (I think) white LEDs for room illumination. And like I just mentioned, it has three intensity settings for both flashlight and room light functions.

It feeds from three NiMH AA cells (800mAh capacity) which can be replaced without the need for tools if necessary.

Size of product w/hand to show scale

SIZE

To use the SunLight, press & release the circular black rubbery button on the side of the "barrel" where the large battery compartment screws are as follows:

Just like it reads on the backs of many shampoo bottles "lather, rinse, repeat".
In other words, pressing & releasing the button an eighth time gives you flashlight mode at maximum candiosity - er - uh - intensity.

The SL-2 comes equipped with a beefy, spring-loaded "carabiner-style" clip on its tail, so you can clip it to your gear while out adventuring, or clip it to an object like a pipe or thin tree branch to allow it to light up the area under it.

Lay the SunLight flashlight/room light solar panel-up (as seen in the example photograph directly below) in direct sunlight or really bright indoor illumination - yes, that's all there is to it!!!

Fully charging the batteries (when charged in direct sunlight) should take eight to ten hours.

The product cannot become overcharged by leaving it in the sun or other light for too long - a circuit inside the SunLight takes care of this for you in case the "circuit" inside your head (your memory) fails.

The batteries furnished with the SunLight are 800mAh in capacity; you may easily and without the need for tools exchange them with 2,500mAh NiMH AA cells for extended runtime - but you must know that the charge time will also increase if you do this.

To change the batteries, unscrew the three large circular covers on the side of the product with a coin such as a US quarter. Tip the 800mAh cells out, and insert three of the 2,500mAh NiMH AA cells into the compartments - orienting them so that their button-ends (+) positives go in first. Then replace and tighten those covers.

The solar cell I use for an automated battery discharge analysis became broken during my most recent move (01-01-09), so I do not have the necessary equipment to perform any battery discharge analyses on this product as of this writing (02-07-09).

The SL-2 is made almost entirely of ABS plastic with a big glass thing (the solar cell array) in its side; therefore, "The Smack Test" is really not appropriate here. It does appear rather sturdy, but because of the solar cell array, I think I'll forgo "The Smack Test" this time around.

The website states that it is water-resistant, but the packaging materials indicate "Do not submerge in water.", so I think "The Toliet Test" would not be appropriate here either, even though the unit passed "The Suction Test" from one of its battery compartments.

So, splash- and weather-resistant?
"Yes".

Submersible?
A rather emphatic "NO!!!"

The SunLight is "intelligent" in that (when it is turned on in any mode) it turns itself off automatically when there is sufficient light to initiate the charge cycle, and turns itself back on ("remembering" the last setting it was on too!!!) when it gets dark enough without you having to {vulgar term for intercourse} with the button. This lends itself very well to using the SunLight as a marker or path light outdoors - totally hands-free.

The SunLight is also regulated - that is, it will maintain much the same intensity for the duration of the battery lifetime, rather than simply slowly dimming from the moment you turn it on like all unregulated alkaline battery-powered lights do.

This evaluation look a lot like the one I made for the BOGO Light Flashlight?
Thought you'd say so.
They're made by the same company and serve much the same purpose - to provide light (as a replacement for dangerous and expen$ive-to-operate kerosene lamps) in developing countries with very minimal (in most cases "NO!") expenditure beyond the initial cost of the product itself.

Beam photograph (flashlight mode) on a wall at 12".
Flashlight mode measures 23,100mcd (low), 57,900mcd (medium), and 86,100mcd (high).

Beam photograph (room light mode) on a wall at 12".
Room light mode measures 3,920mcd (low), 6,770mcd (medium), and 13,034mcd (high).

This is a very wide angle mode, and if I've said this once, I've said it 31,054,500 times:
Wider viewing angles always, always, ALWAYS equal lower mcd values!!!

All measurements were performed on a Meterman LM631 (now Amprobe LM631A) light meter.

My test target has not yet turned up at my new Federal Way WA. USA location, so the corners/edges of several of my "Viva Piñata" posters are shown for scaling purposes.

Beam photograph (flashlight mode) on a wall at ~10'.

Those colored things to the upper right are my "Viva Piñata" posters.

Photograph of the GITD (Glow in the Dark) O-ring
after being briefy irradiated with a 385nm UVA light.

Spectrographic analysis of the LEDs (flashlight mode) in this flashlight.

Spectrographic analysis of the LEDs (room light mode) in this flashlight.

Spectrographic analysis of the LEDs (flashlight mode) in this flashlight; newer spectrometer software & settings used.

Spectrographic analysis of the LEDs (room light mode) in this flashlight; newer spectrometer software & settings used.

USB2000 spectrometer graciously donated by P.L.

ProMetric analysis

Beam cross-sectional analysis (flashlight mode).

ProMetric analysis

Beam cross-sectional analysis (room light mode).

That darker spot at the left-center in both of these analyses
is a defect in the wall that is not otherwise visible; and may be ignored.
You will note that the spot at left-center queered the second test.

(Update 02-08-09): The "spot" that spoiled the second test shows up at the same location no matter where I aim the ProMetric beam profile analyser, and it isn't the instrument's lens either - so there is a defect in the instrument's CCD imager that I cannot compensate for.
The SunLight itself produces a very smooth beam with no "glitches" in it whatsoever.

ProMetric analysis

(Repeated) beam cross-sectional analysis (room light mode).

(Update 03-24-09): As you can see, the same "spot" still exists even after allowing the ProMetric to remain operational for pretty close to one week (~140 hours) - this was done to ensure that the ProMetric's onboard TEC (thermoelectric cooler) had cooled the camera's imager to a sufficient degree.

Graphs made using the ProMetric System by Radiant Imaging.

Video on YourTube showing the operational modes.

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TEST NOTES:
Test units (2) were sent by M.B. of SunNight Solar on 01-30-09, and were received on the afternoon of 02-06-09.

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: 06-24-09

I've decided to rate this product *ALMOST* five stars and place it in The Trophy Case on this website!!!

UPDATE: 06-24-13
The orange one has sprung a leak.
To wit:

It was simply left on an outdoor table, lying on its side with the solar cell facing up in order to charge its batteries; rain somehow got inside and you can see it at the bottom of the bezel (with the product positioned as though charging).

PROS:
Never have to buy disposable batteries for it
Never have to buy bulbs for it
Solar rechargeable - no cords or wall warts to screw with, break, or lose
Two operational modes and three intensity modes for each
Splash- and weather-resistant

CONS:
A bit on the large side - that's what lopped off that fraction of the 5th star

MANUFACTURER: SunNight Solar
PRODUCT TYPE: Solar-rechargeable flashlight/area light
LAMP TYPE: 5mm (standard) and 7mm (wide angle) white LED
No. OF LAMPS: 9 (six 5mm and three 7mm)
BEAM TYPE: Medium spot w/dimmer corona (flashlight), wide flood (area light)
SWITCH TYPE: Pushbutton on/mode change/off on barrel
CASE MATERIAL: ABS plastic
BEZEL: Plastic; LEDs & reflector protected by polycarbonate window
BATTERY: 3x NiMH 800mAh AA cells
CURRENT CONSUMPTION: Unknown/unable to measure
WATER- AND PEE-RESISTANT: Yes
SUBMERSIBLE: For chrissakes NO!!!
ACCESSORIES: Batteries
WARRANTY: 1 year

PRODUCT RATING:

This is a 4.950 Star rating.

SunLight SL-2 Solar Powered Flashlight * www.sunnightsolarstore.com...

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