I got in the wonderful flag maglight. Justin outdid himself on this little jewel. I promptly put it through its paces on my LED analyzer Any interest in a LED/Battery analyzer device?).
I loaded it up with two cheap Fry’s AA cells and cranked it up. It starts out at around 70 lumens/250 mA and after 30 minutes is down to 30 lumens/100 mA. After two hours its down to 20 lumens/50 mA. At 8 hours it is at 10 lumens and around 20 mA. 24 hours later its at 5 lumens/15 mA and still shining, the power is at 40 milliwatts. It looks like that if one wants a lot of light from 2 AA’s driving a Nichia you should use lithium primaries or NiZn batteries. Alkalines discharge to below the LED Vf threshold rather quickly. A pair of NiZn cells should really crank.
The case temperature only rose around 2 degrees C.
The color temperature on the image is shown at 3500K, but this is because the 3000K room lights are on and affecting the sensor. Actual color temp was around 4600K. The color temperature only shifted around 1.2K throughout the test.
