P91 lamp in a G2?

[snowboarder107]

Hey guys, sorry I am a newbie but I have a question. I just purchased a G2 Nitrolon and wanted to know if I could use the 200 lumen P91 lamp assembly with the G2? I have read on here that it will melt the plastic lens, so I am going to upgrade to a 6P head with a glass window so it should fix that problem. I was also going to get a body extender so it will be a 3 cell instead of two. that should give it enough power because that is how much power the G3 has right? I also wanted to know if the surefire rechargeable conversion kit would work with the P91 lamp?
Thanks for the help

 

[Stage Tech]

You could Run the P91 with 2 x IMR 16340 for a few minutes on the original Body.

 

[csshih]

I ran the setup Stage Tech mentioned until my G2 was either lost or stolen.
It worked very nicely.

 

[snowboarder107]

I was just trying to get a little more runtime with the p91 lamp than a few minutes, but that is nice to know that it will work.

 

[Dioni]

You could Run the P91 with 2 x IMR 16340 for a few minutes on the original Body.

+1 and :welcome: to the OP

 

[ElectronGuru]

I have read on here that it will melt the plastic lens, so I am going to upgrade to a 6P head with a glass window so it should fix that problem.

Certain G2/G3 bezels are or can be equipped with pyrex lenses

I was also going to get a body extender so it will be a 3 cell instead of two. that should give it enough power because that is how much power the G3 has right? I also wanted to know if the surefire rechargeable conversion kit would work with the P91 lamp?

The '14' series extenders for G series add what is essentially 1/1/2 cells. You'll need a '19' series extender to add 1 cell length. These are only available in metal form, so if you need all Nitrolon, getting a G3 is the way to go.

Once you're there, G3 length gives not only the ability to run 3 primaries (9 volts) but also 2 higher capacity 17500 rechargeable, yielding 8.4 volts.

 

[mitch79]

Once you're there, G3 length gives not only the ability to run 3 primaries (9 volts) but also 2 higher capacity 17500 rechargeable, yielding 8.4 volts.

I wouldn't run a P91 with 17500 LiCo cells. There are no IMR 17500's yet either.
AW 17500 LiCo's are 1100mAh. The P91 draws 2.7A. That will exceed the 2C max discharge limit of LiCo cells.

Really the only rechargeable option for the P91 in a G2 is AW IMR16340's. Runtime is 10~11min.

You can run primary CR123's in the G3, runtime is ~20min.

Your other option is to use a host that can accommodate 18500 or larger cells.
AW 18500's are 1500mAh, so under the 2C limit and should give you ~30min runtime.
A bored out SF 9P/C3 is nice if expensive. Lumens Factory make quality affordable hosts in the Seraph series. Then there's Solarforce at the cheap end.

EDIT: Just re-read your post. Since you already have a G2, I'd get a borofloat lens from FlashLightLens, and one of their retaining ring tools. Run the P91 with AW's IMR16340's.
Whilst the runtime is 10min, the output stays a nice bright white for the whole discharge. You'd be surprised how long that 10min lasts when used sparingly.

 

[Niconical]

Certain G2/G3 bezels are or can be equipped with pyrex lenses

....and I have one

My only non stock Surefire, a G2-YL with Pyrex lens, fitted for me by Sgt. LED.

Edit: Just thought the 'Guru would appreciate that, see, I do have modded Surefires. (well, one, and only slightly )

 

[sween1911]

One of my G2's is outfitted with the extension from the KR1 kit, which as ElectronGuru pointed out, adds about 1 1/2 times the length of a single cell. I have a 1/2 cell spacer that I made and am running a P90 lamp with (3) CR123's. You could run a P91 in there, but I agree with the others that a metal bezel with pyrex lens should be used.

You can get the A19, which is the aluminum single-cell extension, and run that on a G2 to add the third cell. One thing you might run into is that unless it seats all the way down, the metal sleeve inside the G2 might not make contact with the female thread end of the A19. I used a pair of pliers and very slightly bent the edge out of the sleeve inside my G2 to contact the A19. Very slightly in a few places, gave it a "pie-plate" effect to make contact with the A19. YMMV.

I used to carry a little kit in my bag at one point with the A19, extra cells, and a P90. It's a great platform for playing with, but one of the great things about the G2 is the output you get for the size/weight/cost. I found that once I got a few more high-powered lights, I put the G2 back in stock configuration. It's a great handy little blaster just the way it is.

 

[Illum]

I was just trying to get a little more runtime with the p91 lamp than a few minutes, but that is nice to know that it will work.

One of the great truths in life is that unless your battery size increases proportionally, runtime will not increase proportionally with output, its an inverse relationship. the P91 lamp pulls more current than a P90 lamp, and a P90 lamp will eat up 2 IMR cells in short order already

 

[carrot]

It will run. You may melt the window, but that is replaceable easily.

 

[bouncer]

Before the G3 was available I had a G2 with the kr-1 kit and I used a G2z bezel as it has a pyrex lens with the P91 and 3 cr123 batteries I had no issues .