SureFire KE2-A Head Question

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10-21-16, 16:24
Arch

SureFire KE2-A Head Question

Does anyone know if the KE2-A head has always been the standard head for the M600U light?
10-23-16, 02:45
quackhead

Yes it is the 500 lumen head
10-23-16, 06:40
Arch

Quote:

Originally Posted by quackhead

Yes it is the 500 lumen head

Thank you.

The website says it now has 600 lumen. Do you know the model number for this newer head?
10-23-16, 06:44
Arch

1 Attachment(s)

Attachment 42103
10-28-16, 17:52
quackhead

The 600 lumen rating is new. The ultra was at 500 with the KE2A and the fury was 600 ( don't know part number) I don't have any new 600 lumen ultras to look at. The fury head was a bit larger and bell shaped- easy to tell apart.
10-28-16, 21:22
Uprange41

Is it possible that they're just letting the KE2-A run brighter? Or would that be a different head altogether (KE2-B, for instance)?

Reason I ask, is the 500 lumen M600U is supposed to have a 1.75 hour runtime, while the site says 1.5 for the new 600 lumen M600U; Same as the 600 lumen X300U-B and newest iteration of the X300U-A. I'd guess there's not a significant change to the head, just more light for a little less time.

I could, as always, be incorrect on that.
10-28-16, 23:41
Arch

Thanks for the replies.

I'm completely happy with my 600U / 500 lumen, but am interested in what changed.
10-28-16, 23:42
Arch

Quote:

Originally Posted by Inebriated

the 500 lumen M600U is supposed to have a 1.75 hour runtime, while the site says 1.5 for the new 600 lumen M600Ujust more light for a little less time.

I would give up 15 minutes of battery usefulness for a 20% increase in lumens.
10-29-16, 00:41
Uprange41

Quote:

Originally Posted by Arch

I would give up 15 minutes of battery usefulness for a 20% increase in lumens.

I've got X300U-B's and M600U's, and I don't see any real difference in use between any of them. Same candela rating, functionally identical beam in both throw and spill, and from the passive side-by-side I've done (nothing scientific or deliberate, just using carbines equipped with each), the extra 100 lumens just isn't noticeable to me. Maybe if I just fixed their position and took a photo of each with fresh batts, I'd see the difference, but from my use in shooting at night, it doesn't matter. Not that the runtime differences matter either. As far as weapon light use goes, most of us change batteries long before a light drops to whatever minimum SF uses for their rating (I think it's 50 lumens), and keep fresh batteries in the WML's we might rely on anyway.

Besides, from the reading I've done, we don't perceive brightness linearly. 20% more lumens is certainly 20% more light, but that doesn't equate to seeing 20% more "stuff" downrange. The often-quoted statement over on CPF is that it takes 4x the lumens to give you 2x perceived brightness. If that's accurate, 20% more lumens is negligible. And that's the case in my use between the two as well.