Thoughts on a P60 sized micro-hotwire

Lobstradomus

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I came up with this idea while struggling to sleep last night, and was hoping to get some feedback on the feasibility and/or sanity of my concept. A bit of backstory first - I've been debating what to do with a spare G2 body, of course I could just go with a P91 or one of the ready made hot drop-ins from someone like Lumens Factory but that just seems too easy and too common. I remember a long time ago fivemega did a small run of G4 bi-pin P60 Dropins which looked pretty amazing, especially when combined with an 1185 Welch Allyn bulb and 3 IMR cells, but those seem to be nearly impossible to find.
So I was thinking about building my own bi-pin drop-in and reflector when it struck to me to instead make it a PR potted bulb socket. With a potted socket I can use regular potted bulbs, or any of the bi-pin socket adapters in their various sizes lending to great versatility.

Without any adapter I could use a common 3 cell Mag bulb with a single lithium ion battery, two li-ions with a 5 or 6 cell Mag bulb, or my personal front runner 2 IMR's with a ROP bulb (going by LuxLuthors destructive testing it looks like 500+ lumens with the low bulb or (with a bored out host) possibly over 1k lumens with the high bulb on a pair of 18350 IMR cells.)

Of course those numbers seemed like they would give any bi-pin bulb a run for their money, until you add in a third battery that is, (this is where I really start to question the sanity of my idea.) Granted there don't seem to be very many bulbs that can handle the initial voltage of 3 IMRs while still putting out some decent lumens (aside from the Carley/FM 1909 @~2k lm.) But with a soft start switch the options open up a bit more to include the WA1185, JC5607 or even the Osram 56580 and GE 427118 if used with batteries that can withstand the 8 amp draw.

Of course sheer massive output isn't the only benefit of a potted bulb drop-in, as I mentioned regular Mag Lite bulbs could be used for longer run times, or with different bi-pin adapters the light could be fitted with a streamlight TL-3 bulb, mini-mag bulbs or possibly even some 5mm LED's with a bit of modification.

So that's my idea, I still need to work out the construction but it seems like it would have huge versatility with battery and bulb combinations and be capable of massive output (granted its probably just going to spew light everywhere with the incredibly small reflector to bulb size ratio.) My main concern is heat transfer to the batteries and keeping them cool, but even if I can isolate the heat inside the bezel if it doesn't melt/catch fire would the trapped heat risk essentially cooking off the bulb? Still something about the idea of a G2 1k+ lumen ROP sleeper almost makes the risk of catastrophic failure/fire/explosion seem worth trying.

Thoughts? Warnings? Mental Institution recommendations?
 
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Yep, the G4 Sunlight sockets are very hard to find. But the T1.5 sockets are still available, and i've got one. You can use a Cl FM1794 bulb for around 1000 bulb lumens with 2 18650s/18350s/16340 or a CL1499 for 500 bulb lumens. There are other T1.5 bulbs to use.

I use a FM1794 with IMR18350s in the D26 socket/reflector, with a HS reflector it has got a very even and massive flood.
 
A simple solution would be P91 with 2 X 16340 IMR cells in a G2 or similar light. I added a McClicky switch and use this light all the time. Bright. Simple.
 
I used that configuration in a G2Z for quite a while, too - it was enough to light up most of a football field to "See Humanoid Silhouettes" levels of brightness, but I was always worried about running it too long and overheating it; there was an incident when I ran a P90 for ten minutes or so and damaged one of my IMR cells.

I really like the idea of a PR bulb adapter with a D26 reflector. I have more or less standardized on ROP bulbs as my hotwire of choice, so I'd pretty well have to get one of these bad boys, especially if they're as cheap as I suspect they could be.
 
If you want another Sundrop G4 production run OR custom PR bulb P60 express your interest to FiveMega garnering sufficient interest along the way to make such a venture financially viable for him...
 
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