Lamp options for Surefire M4 Devastator

[choombak]

I have a nice M4 sitting around w/o the lamp. The MN60 are almost unobtanium, and Lumens Factory has the M3T (LED) and the incan lamp available. I wish to keep the body/head intact, so Malkoff isn't an option. I will prefer an incan lamp, but am open to considering an LED module too.

Apart from Lumens Factory, are there any other options?

 

[fivemega]

I have a nice M4 sitting around w/o the lamp. The MN60 are almost unobtanium, and Lumens Factory has the M3T (LED) and the incan lamp available. I wish to keep the body/head intact, so Malkoff isn't an option. I will prefer an incan lamp, but am open to considering an LED module too.

Apart from Lumens Factory, are there any other options?

If you have an adapter for bi-pin bulbs, any (6V , 10W) bulb will work with pair of 16650 batteries.

 

[choombak]

I managed to use MN10 with a pair of 16650 batteries. Not too bright, but does the job.

@fivemega Can you recommend me a bi-pin adapter? Thanks.

 

[fivemega]

@fivemega Can you recommend me a bi-pin adapter? Thanks.

You may try B/S/T section of this forums. Hopefully someone may have some extra.

 

[Monocrom]

Love my Leef-bodied M4.... and definitely wish I had a bi-pin adapter for it.

 

[thermal guy]

Last I looked there was a T custom bI-pin still available on eBay.

 

[Monocrom]

Not coming up. Guess someone snagged it.

 

[thermal guy]

Ya I just looked as well. Just Maglite stuff from him. Sorry

 

[Monocrom]

Ya I just looked as well. Just Maglite stuff from him. Sorry

No worries. I appreciate the assist. 👍 👍

 

[thermal guy]

So I'm currently running a MN16 with 2X16650's in my M4. Putting this combination against a MN 61 on 4 primaries it blows it away! Am I overdriving the MN16 that much? I expected the MN61 to be much brighter but it's not. Any thoughts?

 

[ampdude]

So I'm currently running a MN16 with 2X16650's in my M4. Putting this combination against a MN 61 on 4 primaries it blows it away! Am I overdriving the MN16 that much? I expected the MN61 to be much brighter but it's not. Any thoughts?

I don't think the MN16 is going to last very long.

 

[thermal guy]

Got an hour or so on it so far. I'm thinking under load 3X123 are 7 volts and 2 lithiums are what 8? I don't think it's over driving to much. I'm just shocked that it out throws a MN 61

 

[ebuchner]

Looking at the rough filament dimensions I think they're right in line what you're seeing. The MN16 definitely has a slightly smaller diameter filament coil. The difference isn't huge but it is meaningfully keeping more of the tungsten closer to the focus of the reflector.

 

[fivemega]

According to this, MN16 drawing about 2.5A from 3xCR123A so it's 6.6V bulb.
And MN61 also drawing about 2.5A from 4xCR123A so it's 8.8V bulb.
Each primary CR123A drops to about 2.2V under 2.5 Amps.

 

[thermal guy]

So 2/18650 /16650 with a Mn61 should be fine

 

[vicv]

So 2/18650 /16650 with a Mn61 should be fine

It will be fine, but it will not be very impressive. Definitely undervoltage. For that set up you'll want the MN20

 

[fivemega]

So 2/18650 /16650 with a Mn61 should be fine

Not really but as mentioned above, MN20 will be better choice if you want to use genuine Surefire bulbs.
I use 2x18650 in bored out M4 with bi pin socket and WA1111 bulb.

 

[thermal guy]

Can you find WA1111 bulbs anymore?

 

[fivemega]

Can you find WA1111 bulbs anymore?

Yes I can. You can also go with different brand 6V, 20W and 100 hours life such as PHILIPS 7388
I Think finding a MN bi-pin socket is more difficult unless you already have one.

 

[thermal guy]

I have this one G4 Xenon Bi-Pin Socket from tad. Will that work? But using 2X16650's I don't want a 6V bulb do I?