'New' G4 base bulb: 6V, 25W

[Tirodani]

Just thought I'd let you folks know about this bulb I found that could be useful with two of AW's protected C cells (or maybe 18650's?) It's an inexpensive 25W, 6V, G4 bi-pin bulb available here. Should be under 5 amps, so I don't think it will trip the protection on those cells. Searching yielded nothing, but if you've used them let me know. Could be a good for a 2C mag?

I have some, but I ordered the wrong size FM bi-pin base, so I don't know what I'm going to do with them. :shrug:

 

[jasonck08]

I don't think 2x18650's will fit in a 2C mag very easily. As it is a very tight fit in a 2D mag. You usually need to cut down the tail spring.

 

[UnderTheWeepingMoon]

Two 18650s will fit a 2C Mag using this reversible mod.

 

[swampgator]

Two 18650s will fit a 2C Mag using this mod:
1) Deanodize the inside of the tailcap
2) Set aside the stock 2C spring
3) Place Minimag spring in the tailcap
4) Put back together

For a permanent fix the AA spring could be attached with conductive epoxy, but this method is completely reversible and requires nothing more that what most will have on hand anyway.

 

[mdocod]

Bulb life spec is missing. I'm going to assume it's a "2000" hour style long-life bulb, but it might not be, until we know this, there is no way to know if it's worth running on a pair of li-ion cells. The bulbs we get good results from on 2 li-ion cells are generally rated 6V 50-200 hours life. If this bulb you found is in fact, a more normal "long life" then it would be dismally yellow and inefficient on 2 li-ion cells compared with the proven alternatives.

Eric

 

[Tirodani]

Bulb life spec is missing. I'm going to assume it's a "2000" hour style long-life bulb, but it might not be, until we know this, there is no way to know if it's worth running on a pair of li-ion cells. The bulbs we get good results from on 2 li-ion cells are generally rated 6V 50-200 hours life. If this bulb you found is in fact, a more normal "long life" then it would be dismally yellow and inefficient on 2 li-ion cells compared with the proven alternatives.

Eric

Very useful information, thanks. I'm working on giving a couple away for testing.