E2XT Heads

[NH Lumens]

That's what I thought. I misunderstood the post thinking the new head had less throw

It does, by virtue of the fact that the E2SHT has a substantially tighter hot spot than the E2XTD - at least my sample of the E2SHT does.

Gene stated that there's been a number of revisions to the head since it was released as the E2SHT, so no surprise that it's been tweaked. The current E2XTD has a wider hot spot than my sample of the E2SHT, though not quite as intense. As I posted, my sample of the E2SHT exceeded the 70,000 cd spec by at least 10%. It's either a sample-to-sample variation, or the head has been tweaked as described.

 

[QMT93]

Sounds like you won the sample lottery.

What do you use to measure the lumens and candela @NH Lumens ?

 

[NH Lumens]

Candela can be measured directly with a lux meter, which is what I have done;

Guide: Measure throw and beam distance for your flashlights - in 3 steps

Everybody is able to measure the beam distance for any particular flashlight. All you need is the Lux at a certain distance. Follow these steps to learn the beam distance of your flashlights.

lepflashlight.com

Measuring lumens is not as direct, requiring an integration sphere or some DIY enclosure to serve as one.

For the run time graph above, I took simple lux readings every 30 seconds until the lux reading fell to 10% of its initial value. I correlated the initial reading at 30 seconds after turning the light on to the lumens rating of the head - I did not calculate lumens directly. I have a DIY integration sphere project (styrofoam cooler) in the works so I can attempt to calculate lumens, at least on a comparative basis.

BTW, my E2SHT head is looking for a new home - PM me if interested.

 

[QMT93]

Thanks @NH Lumens for the explanation! I'm still saving up for the next light, so I'll keep your Malkoff jackpot sample in mind.