5 WATT WARM WHITE LED DESK LAMP
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5W Warm White LED Desk Lamp, retail $129.99 (www.primeave.com)
Manufactured by Optron (URL not known)
Last updated 05-06-13
The 5W Warm White LED Desk Lamp is...what else...a 5W Warm White LED Desk Lamp!
It is listed as model number OP3000.
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.
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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.
To use this lamp, very gently press & release the large rectangular button on the upper surface of the lamp's base in the following sequence:
Just like it reads on the backs of many shampoo bottles, "lather, rinse, repeat". In other words, a sixth press & release turns the lamp on in low mode.
Just above the switch bar, there are four yellow-green LEDs - these indicate the intensity level you've selected:
1 lighted is the lowest, and all 4 lighted is the highest.
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. 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 cannoņata (I guess I've been watching the TV program "Viva Piņata" too much again - candiosity is usually checked with a scanner-type device on a platform with a large readout (located at Piņata Central), with a handheld wand that Langston Lickatoad uses, with a "pack-of-cards"-sized instrument that Fergy Fudgehog uses, and the cannoņata (also located at Piņata Central) is only used to shoot piņatas to piņata parties away from picturesque Piņata Island), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that flashlights may have inflicted upon them. Therefore, this section of the web page will be significantly more bare than this section of the web page on a page about a flashlight.
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. The "OPTRON" graphic remains lighted even when the lamp itself is turned off; this serves two primary purposes.
1: It serves to let you know that power is available.
2: It behaves as a marker light at night; almost bright enough to function as a nightlight.
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. Here, let's show you with a photograph...
Snap...Click...and it's off to the Fotomat we go:
See the diffusing dome visible under the arm of this lamp and above the monitor?
This photograph was taken at my eye level.
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.
This is all I did to eliminate the "spot".
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!!!
Temperature control is excellent!!!
After several hours of continuous operation in "high" mode, temperature on the warmest part of the lamp measured 98°F (36.7°C) with an ambient temperature of 82°F (27.8°C).
The next day, I once again measured the temperature...ok, I measured 107°F (41.6°C) with an ambient temperature of 79°F (26.1°C) using the same physical and operational parameters as the previous temperature measurement - only this time the cooling fan {a large floor fan} (for cooling me, not any electronics within proximity) was not turned on.
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. The pulses are spaced closely enough together that the light appears to be continuously on to the human eye.
Please see the photograph farther down this web page that shows this.
Beam photograph on the test target at 12".
Photograph was deliberately uncropped to show the very wide dispersal.
This lamp has four levels; here are the measurements for all four levels:
All measurements were taken on a Meterman LM631 light meter.
This is a very wide-angle source, and if I've told you once, I've told you 10,000,000,000 times:
Wider viewing angles always, always, ALWAYS equal lower mcd values!!!
The advertising claims that it has a luminance of up to 1,100 lux.
Photograph of the lamp lighting up the pages of a *LARGE* book about used up old insulaters.
Beam photograph on a wall at ~10 feet.
On the lower right edge is a calendar my sister gave me.
And those faint green spots are from a Laser Stars unit.
Showing the flickering on the lowest intensity setting.
The camera was rapidly waved about while this photograph was being taken.
I'd normally use my oscilloscope for this, but the photoelectric sensor
I'd use has been packed away for a move to take place in the near-future.
I FOUND THE PE (PHOTOELECTRIC) SENSOR FOR MY O-SCOPE!!!
Photograph of an oscilloscope screen at the lowest intensity setting (setting #1).
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).
Spectrographic analysis of the warm white LED in this desk lamp (maximum intensity).
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 (minimum intensity); spectrometer's response narrowed to a band between 430nm and 480nm to pinpoint native emission peak wavelength, which is 453.992nm.
Spectrographic analysis of the warm white LED in this desk lamp (minimum intensity); spectrometer's response narrowed to a band between 540nm and 590nm to pinpoint phosphor emission peak wavelength, which is 570.00nm.
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 (maximum intensity); spectrometer's response narrowed to a band between 430nm and 480nm to pinpoint native emission peak wavelength, which is 455.020nm.
Spectrographic analysis of the warm white LED in this desk lamp (maximum intensity); spectrometer's response narrowed to a band between 540nm and 590nm to pinpoint phosphor emission peak wavelength, which is 570.344nm.
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 (minimum intensity); spectrometer's response narrowed to a band between 447nm and 457nm to pinpoint native emission peak wavelength, which is exactly 454.00nm.
Spectrographic analysis of the warm white LED in this desk lamp (minimum intensity); spectrometer's response narrowed to a band between 565nm and 575nm to pinpoint phosphor emission peak wavelength, which is 567.210nm.
Spectrographic analysis of the warm white LED in this desk lamp (maximum intensity); newest (01-13-13) spectrometer software & settings used.
Spectrographic analysis of the warm white LED in this desk lamp (maximum intensity); spectrometer's response narrowed to a band between 447nm and 457nm to pinpoint native emission peak wavelength, which is 452.590nm.
Spectrographic analysis of the warm white LED in this desk lamp (maximum intensity); spectrometer's response narrowed to a band between 565nm and 575nm to pinpoint phosphor emission peak wavelength, which is 569.250nm.
WMP movie (.avi extension) showing how the switch behaves when touched continuously.
This clip is approximately 3.79 megabytes (3,822,216 bytes) in length; dial-up users please be aware.
It will take no less than seventeen minutes to load at 48.0Kbps.
I cannot provide it in other formats, so please do not ask.
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.
TEST NOTES:
Sample of the 5W Warm White LED Desk Lamp was sent by W.C. of Tekram USA, Inc. on 05-30-08 and was received on the morning of 06-03-08.
The "wall wart" AC adapter has an output of 9 volts DC at 800mA.
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: 03-17-10
The bulb in my 3-level incandescent desk lamp blew out, so I'm now using this lamp in its stead.
UPDATE: 03-19-10
The blue LED in the Optron logo (above the level LEDs) has gone out.
This does not affect the functionality of the lamp however, so its rating will not change.
UPDATE: 03-25-10
That blue LED in the base has not actually gone totally out; it has simply dimmed drastically.
PROS:
Nice warm white color; does a very nice job at illuminating desktop with pleasant color
Adjustable intensity
Totally flicker-free at maximum intensity setting
Light source is an LED - no incandescent bulbs to change or cause burns
Light source is an LED - up to 50x longer life than incandescent light blubs
Low power consumption makes this lamp easy on your electric bill
CONS:
None that I have noted thus far
MANUFACTURER: Optron
PRODUCT TYPE: Desk lamp
LAMP TYPE: 5W warm white LED
No. OF LAMPS: 1
BEAM TYPE: Medium flood w/soft corona
SWITCH TYPE: Touch switch on/mode change/off
CASE MATERIAL: Metal & plastic
BEZEL: Diffused dome protects LED emitter
BATTERY: N/A
CURRENT CONSUMPTION: Unknown/unable to measure
WATER- AND PEE-RESISTANT: Very light splatter-resistance at maximum
SUBMERSIBLE: NO WAY HOZAY!!!
ACCESSORIES: AC adapter
WEIGHT: ~3.8 pounds
WARRANTY: Unknown/not stated
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