Why is the E3P runtime soo short?

[Splunk_Au]

I was comparing against the Fenix L1D CE Q5 which got about 1 hours and 30 minutes on turbo mode. The Jetbeam E3P got about the same lux numbers but last only an hour?

 

[yellow]

1st: have both lights run for 15 mins, then measure current draw at the battery.

2nd: Set draw of the the Jetbeam at the same value than the Fenix
(description says "easy brightness-adjusting operations", so I suppose this is possible)

3 rd: NOW compare runtime and brightness again
(before it is totally useless doing so)



PS: I did not get that You measure "lux"...
... if Your two lights feature the same lumen but very different beams, the one with the wider beam will give much lower lux readings

 

[Splunk_Au]

I'm not sure what those do, anyway I dont have both these lights, just going by comparing them on light-reviews.com they seems to have similar beam pattern and lux number so i assumed they were about the same output.

 

[adirondackdestroyer]

I would imagine that the Fenix has a much more efficient circuit. Jetbeam is known for making great looking flashlights, but they are also known for having some of the most inefficient circuits of any high quality flashlight.

 

[Splunk_Au]

What a waste, i thought with a simple high/low circuit they could have at least improved the effeciency.

Btw in case anyone's interested to see the runtimes, I was refering tot the review here: http://light-reviews.com/jetbeam_e3p/

 

[richardcpf]

Because the E3P is not designed to get maximun efficiency and brightness, but good look and build quality. Like most surefire flashlights.

 

[N/Apower]

Because the E3P is not designed to get maximun efficiency and brightness, but good look and build quality. Like most surefire flashlights.

Is this why my Malkoff M60 is supposed to make 220-240 REAL lumens for 1.5 hours and the 125 real-lumen bulb by SF is good for an eternal 20 minutes?

 

[FlashInThePan]

Actually, that's probably because Malkoff's drop-ins use an LED, while the Surefire bulb you're referring to is likely the (less-efficient) incan. It's an apples and oranges comparison.

No flashlight escapes the laws of physics; brightness and runtime depend on the LED, the circuit, the level it's driven at, and the batteries. If Surefire were to put a Q5 in their host and drive it at the same levels Gene drives his at, you'd get similar brightness for a similar amount of time.

That said, there are other reasons to love Malkoff drop-ins: warm tints, phenomenal beam patterns, and excellent durability are just a few. =)

- FITP

Is this why my Malkoff M60 is supposed to make 220-240 REAL lumens for 1.5 hours and the 125 real-lumen bulb by SF is good for an eternal 20 minutes?