From Seattlite "Surefire rates the MN21 at 500 Lumens, just like Surefire rated the E2DL at 120L. All I know is that the MN21 aint 500 Lumens and is approaching HID level brightness. I have a MC-E Deerelight, CL1H V4, and from ceiling bounce tests, the MN21 is still brighter. How about some non-scientific qualitative comparisons. Granted each one has a different beam profile, but you still get the feeling that the MN21 puts out lot more light than 500L. Distance to the tree is about 60':"
Well since I already lost one bet, I am not going to test my luck again on Surefire "rated" lumens. You just might be right, that in this case its actually higher than 500 lumens because they are grossly underrating the real output. But I am sure its drawing the power to match that output. Still think the Solarforce L900M and similar type LED lights would give it a run for the money in total brightness.
Anyway this seems like a good thread to put my comparison data in just to add to the knowledge base of incandescents versus LEDs.
I have the Solarforce L900M (P7) that runs off of 2X18650. Its listed as 900 lumens at the source but I am sure its in the mid 700 lumen output range, compared to my Malkoff Triple Drop and other threads I have read. It draws 1.9 amps off of those 2 batteries on high. Assuming the voltage under load is about 7.4 to 7.8V on fresh batteries. thats 14 to 14.8 watts.
I have a Lumens Factory Extreme Output 9V 380 lumen rated lamp that I run with 2X18650's. It measured a real 270 lumens output through AR coated glass and draws 2 amps. Assuming the same 7.4 t0 7.8V under load thats. 14.8 to 15.6 watts of power. Just slightly higher power consumption for roughly about 2.8 times less output from the incan. Or about 2.8 times more output from the LED for about 1 watt less power draw (roughly) than the incan.
A friend came over last night and showed me his new Solarforce L600 which is a 500 lumen "rated" incan flashlight system. I looked up the specs and its a "Philips 7388 Bulb 6 volts, 20 watts, nicely overdriven in the L600 to produce well over 500 Lumens" (Quoted from Lighthound website page for this lamp. It runs on 2X18650's as well. My friend said they were freshly charged. Current draw was 3.8 amps. Could not measure the voltage drop at that current level but I am sure its sagging under load below 7.4V and would be no better than 7.4V. If we go by what Lighthound site claims of 20 watts, that means the voltage has to sag down to 5.26V. I am guessing it was higher than that still. So lets just say it was over 20 watts. The brightness of that lamp next to my LF EO9 was just slightly brighter. Mostly in the spill. I am not saying the bulb wasn't 500 lumens but coming from a deep OP reflector and glass lense with no AR coating you are going to lose at least 33%. So that puts it below 350 lumens right there.
He's got 20 maybe 30 minutes run time of non constant brightness with that thing on a lamp that may be good for 26 hours. On the same batteries at almost half the current I am definitely getting more than 700 nice white lumens. In theory I should get over an hour of run time.
Yeah the red fence looked better with the Incan light but I would much rather have the peak lumens and still better run time with the LED P7. This L900M has a very nice beam pattern as well.
What type of power draw does this M6 with the MN21 bulb run? I would guess that its over 20 watts.
I would still prefer the LED, than the HID, to this type of Incan light.