4sevens AA XML Quarks no longer thermally regulated?

I was looking at the 4sevens product pages for their AA Quarks, and I think they've changed something under the "features" for the XML versions of their lights.

I'm fairly sure they used to state "thermal regulation" for the QP2A-X, which referred to the 3-minute step-down in brightness that occurs on turbo. (I don't think the step-down was necessary on the regular QP2A with the XPG LED.)

But now they have removed it from the feature list. Or am I misremembering it being there in the first place?

Does that mean that the latest QP2A Quarks no longer have the 3-minute step down feature for thermal regulation? Or, is it still there, but they removed it from the feature list for some reason?

Conspiracy theory: perhaps they are going to replace the automatic step-down with something more accurate, like a PID controller for thermal regulation, in the next versions of the Quarks? So they're saving the "thermal regulation" nomenclature for when they introduce it again?

Etsu said:

I'm fairly sure they used to state "thermal regulation" for the QP2A-X, which referred to the 3-minute step-down in brightness that occurs on turbo. (I don't think the step-down was necessary on the regular QP2A with the XPG LED.)

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Nope, they never mentioned thermal regulation or the step down (I have a Goodreader copy of their original spec page from their black screen website days). Instead they have choosen to conservatively list a spec that is closer to the stepped-down output. I match ti-force's meter readings of ~250 lumens stepped down, and mid-300s for the stepped-up output. I don't think anything has changed.

I wish. I took mine out of my pocket at far higher than acceptable temperatures more than once after accidental activations. Shame on me of course for putting the forward clicky on a regular Quark, but still...

reppans said:

Nope, they never mentioned thermal regulation or the step down (I have a Goodreader copy of their original spec page from their black screen website days). Instead they have choosen to conservatively list a spec that is closer to the stepped-down output. I match ti-force's meter readings of ~250 lumens stepped down, and mid-300s for the stepped-up output. I don't think anything has changed.

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Okay, I guess I am crazy then, I could have sworn their website used to list thermal regulation under the features. Maybe I'm thinking of some other manufacturer. Yeah, I measure the brightness similar to yours, pre and post step-down.

Etsu said:

.... Yeah, I measure the brightness similar to yours, pre and post step-down.

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That's a conservative lumen scale then.. I believe you have/had the SC52? Did you measure it? if so how did you find those specs in comparisons, particularly all the L modes?

reppans said:

That's a conservative lumen scale then.. I believe you have/had the SC52? Did you measure it? if so how did you find those specs in comparisons, particularly all the L modes?

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I briefly had a SC52w, but gifted it for Christmas because the one meant as a gift hasn't shipped yet. When I get the next one, I'll measure it. From visual estimates, I'd say the SC52w was about as bright on max (using a AA) as the Quark 2xAA XML2 was on max after the step down. But that's just a guess for now.

Etsu said:

I briefly had a SC52w, but gifted it for Christmas because the one meant as a gift hasn't shipped yet. When I get the next one, I'll measure it. From visual estimates, I'd say the SC52w was about as bright on max (using a AA) as the Quark 2xAA XML2 was on max after the step down. But that's just a guess for now.

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Be interested in what you find... and across all the modes since almost all the specs between the two line up on both lumens AND runtime.