Surefire U2 Ultra

[trvc]

Is it possible to increase the output on the Surefire U2 Digital Ultra .It's a great light I love the size but more output would definitely be desirable any help/information would be appreciated thank you

 

[scalpel_ninja]

Is it possible to increase the output on the Surefire U2 Digital Ultra .It's a great light I love the size but more output would definitely be desirable any help/information would be appreciated thank you

Adventures in Modding a Surefire U2 - Confirm Version?

Hope all is well with the modding community! One of our dear members for whom I've done two Blackhawk Gladius mods asked me if I was up to the challenge to mess with a U2. I said sure! Pouring over the threads from the OG U2 modder @Nitroz and trying EVERYTHING (including slightly heating the...

www.candlepowerforums.com

 

[ampdude]

The U2 is one of the best lights Surefire ever made. It's a shame they decided to drop it. But they made a lot of mistakes like that back then trying to compete with cheap Chinese manufactures when their military contracts ran dry.

 

[Kestrel]

Luxeon V version; yes, most certainly. I have a modded one.

Seoul P4 version; not significantly.

Which version do you have ?

 

[ABTOMAT]

The U2 is one of the best lights Surefire ever made. It's a shame they decided to drop it. But they made a lot of mistakes like that back then trying to compete with cheap Chinese manufactures when their military contracts ran dry.

I've had an early Lux V U2 since I bought it used on CPF in 2009. Great flashlight. They tried again with the UM2 but I sold mine after those turned into collectibles.

 

[sween1911]

Hey @trvc I've done an LED swap on a U2 in the thread @scalpel_ninja posted. It depends on the version of the LED. If you post a picture of the LED in the center of the reflector, it can help determine the level of effort.

 

[trvc]

Hey @trvc I've done an LED swap on a U2 in the thread @scalpel_ninja posted. It depends on the version of the LED. If you post a picture of the LED in the center of the reflector, it can help determine the level of effort.

Are these OK

 

[Kestrel]

Looks like the LuxV emitter to me, w/ that central cross showing the 4 dies. Is that the opinion of others here?

The LuxV version is def. the better upgrade candidate; they are driven at ~twice the level of the later SSC P4 version. So with modern emitters in both, ~twice the output.
/And/ the boost driver is a better match to a single large-capacity LiIon cell compared to the buck driver of the later version.

 

[scalpel_ninja]

I agree, looks like a Luxeon V. Hexagonal shape, unlike the Seoul P4 that is square with four visible silver tabs.