There is absolutely no need to do so. There are hundreds (thousands?) of photos taken of LEDs on CPF through the glass or plastic lens
which allow one to clearly identify the LED.
The picture you posted is very small.
My email is in my signature.
Would you mind emailing to me a copy of the photo?
If you place your camera an inch in front of the lens and use macro mode,
you can get a very detailed picture which in no way will void the warranty.
Although it is difficult to tell, it appears to be an XP-Something. Can't tell if XP-E or XP-G.
Could you post a photo of the superior switch mechanism?
I just emailed them, so, we will see what they say:
Subject: Bright Star 2217 LED...
Hello! I have some questions.
1) What LED is used in the Bright Star 2217? Cree XP-G, XP-E, etc.?
2) What efficiency bin is used? R3? R4? R5? etc...
3) What tint is used?
4) What type of switch is used?
5) Does the light use a simple resistor, or, a driver circuit?
6) Is the 200 hour output a long, slow, steady decline, or a flat, regulated curve?
I used the LED calculator
linked here with the following parameters, assuming a Cree XP-G R5 efficiency bin:
Desired LED Current: 105mA
LED Forward Voltage: 2.790 V
Battery Input Voltage: 3.0 V
Battery Capacity: 16000 mAh
(an Energizer "D" alkaline can supply approximately 16000mAh at 100mA draw)
Converter Efficiency: 90%
Runtime: 147.47 hours
So with intermittent use, 40 lumens is possible for about 148 hours.
7) How have you arrived at the 40 lumens for 200 hours figure?
8) Does this include 148 hours at 200 lumens and decreasing output for the remaining
52 hours? If this is the case, it is still an excellent bargain.
9) I would very much like to purchase one for testing and evaluation, depending on your answers to my questions. Is there a telephone number where I can speak with someone who can help me? I would be proud to support an American business.
~Many thanks,
Flashlight Enthusiast
EDIT: Assuming there is a decent driver in there which can really pull 140+ hours out of a pair of "D" cells, I think we are obligated to swap the LED for an XP-G2 R5 for a few extra lumens...