Tads G4 bi-pin question

[Buck91]

Are there any bulbs that would fit this and run comfortably off 3xCR123? I feel like the 2.5A (MN7225) bulbs that came with it aren't a great match for primaries and I would like an option. Also, taking votes on 2x17500 vs 2x16650 with extender on my M3T.

 

[fivemega]

2.5 Amp for primary C123A is not friendly and voltage will drop to about 2.2 Volts therefore underdrive 7.2 V bulb. Also you will get maximum of 20 minutes run time.
Using pair of 17500 will be better choice but run time will be still too short.
If you can bore out body and use pair of 18500 or 18650 cells, you will be more satisfied with brightness and run time.

 

[chillinn]

Are there any bulbs that would fit this and run comfortably off 3xCR123?

There are plenty of 6V 10W G4 base halogens allegedly available in 1.66A that you can test overdriving on 3x CR123A. Something like Osram 64410 perhaps, or Philips 6605 maybe, or Osram 64423 possibly. There are also 6V 5W G4 base halogens ostensibly available in 0.83A that you can test overdriving, like Higuchi JC5603, God willing. My understanding thus far is that overdriving bulbs will cause them to draw more amps, so be aware of that.

Disclaimer: I have no idea if any or all of those lamps suck for flashlighting.

Also, taking votes on 2x17500 vs 2x16650 with extender on my M3T.

If you're asking about lamps, Tad's A7212 7.2V 1.2A bipin is nice if you have his M3 socket but idk a source for his lamps anymore (bah, that won't work in M3T, srry). But Mark's HO-M3T 380Lm 1.81A-2A lamp assembly is available, as well as his IMR-M3T 700Lm 3.03A-3.4A lamp assembly. Actually, he recently told me he doesn't keep any lamp assemblies stocked. He builds them to order.