Okay. I don't know why I haven't done this until now. =P
I bought a small USB fan to cool down the flashlight while it's performing the runtime test.
http://www.arctic-cooling.com/catalog/product_info.php?cPath=39_&mID=123
This actually changes some results quite a bit. Cooler flashlights = longer running flashlights.
Heat is a big enemy when talking about efficiency of flashlights.
The hotter it is, the shorter the runtime and may even damage the flashlight.
I've had many flashlights which get hand burning hot during long running at maximum output.
I've also seen many that dim down very quickly due to extreme heat.
I hope the use of the fan to cool down the flashlight during run time tests produce much more accurate results.
As I speak, I'm re-testing the MTE C2-1 runtime test as my before only showed it running for around 45mins.
But now with the fan, it runs for nearly 80 minutes before dimming down...! wow.
Anyways. All future tests I hope is more accurate in terms of what the flashlight is really capable of. =)
jayki