You beat me to it. I am curious now. Like the OP stated it probably wouldn’t make any difference. I would like to see a XPg vs XP-G2 with 18650 side by side.
Keith
Look here. Top of the page has a MG P-rocket xpg straight swap to xpg2. Second page I post up the same data on an s-mini and a fenix LD01. No beamshots though....still been too dang warm outside at night.
Arrr…that be the one, matey.
100 lumens vs 125 lumens isn't 25% brighter
it's 6% brighter ..
a 25% lumen increase equals only 6% extra brightness
There are a lot more important things in a light than a bit of different in output. If you’re going to pay that that much for something, get a zebralight.
Otherwise, get a xpg like Trustfire a3 for <$20.
The xpg2 has a tighter beam profile, better efficiancy and I would call 125/100 lumens, 1/4 more so 25% brighter. Am I wrong?
What Boaz is referring to is the fact that it takes quadruple the lumens for your brain to perceive double the brightness.
Ah yes, that I knew
However, you are technically right because it still is 25% brighter, you just will only perceive it as 6% brighter, aka you wouldn't notice it short of a side to side comparison.
Which is why I buckled and got an XPG2 preon1 on order. I’m guessing it’ll be more noticeable than 6% with the tighter beam pattern but still only visible upon comparison
I would be interested in a XP-G2 AA.
Maybe E1320 will have a option for his upcoming AA group buy :heart_eyes:
I’m still waiting for a nice XP-G2 P60 Drop In, wether it is from SF or UF or someone else, I really love the beam profile of the old XP-G (+ OP reflector) and would love to see the new XP-G in a similar setup.
I hope it doesn’t takes the manufacturers too long do produce a nicely driven drop in.
I have done a lot of searching on the internet for a formula for perceived brightness but did’nt find any. Can anyone enlighten me with a link, please?
I have not seen any websites with a formula or anything, this is just what I have noticed. However it may have something to do with the square inverse law.
I always heard that the eyesight as well as the hearing was logarithmic in nature. Strange that a formula cannot be found.
I got a FourSevens Mini Ma XP-G2…$39. I run it on a 3v lithium AA primary. A nice little light.
The mini is a great choice. I picked the preon just cause I have the hi cri and coolwhite to compare.
For brightness differences, there’s no chart per say but some good info if you look up magnetic control ring lights. Quality infinitely variable lights step up in a fashion that’s noticeable to the eye… Which if I remember right is roughly 40% increases in brightness to be visible to the eye
i know that the difference between 360 and 650 lumens from my zebra (i believe those numbers) isn’t THAT big in real life
but side by side you should be able to see the difference between xp-g and xp-g2 (mainly in throw)
The XP-G2 tint is nice and white. No sign of the green meanies.