Another bulb question...

cutlerylover

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Quick question, how would this bulb hold up in a mag85 running a battery pack at 12.5V...?

:poof: ? Im still considering other bulbs to use while I wait for new WA1185's...

http://www.radioshack.com/product/index.jsp?productId=2102800&cp=&sr=1&origkw=bulb&kw=bulb&parentPage=search

I dont mind that I wouldn't be gettign everythgin out of the bulb, just lookign for somethgin better than a stock mag bulb...I understand votage now, but I am still confused about how different mA amounts work? How would 240mA work running on 12.5 volts?
 
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Flash_Gordon

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Save your time. It would be a little underdriven at 12.5V.

Mainly, it is not a high output lamp at 240 mA. A typical 2D flashlight lamp is in the 300 mA to 1A range. Your stock Mag will put out much more.

It would , however, run for a long time.

Mark
 

cutlerylover

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Thaks Mark...yeah Im still learning about all the technical aspect of bulbs, lights, and the power they use, so its all confusing to me still..but I appreciate your info which helps...
 

Icebreak

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Flash_Gordan is correct as usual.

Here's something that may help with figuring combinations for your experiments.

V x A = W


One of my Mag85s is a particularly good performer. At the 10 minute mark it is still delivering 10.86V and 3.31A. So it's 35.9466 watts.

That bayonette lamp at 12.5V x .240A (240 mA) would be 3.05 watts at best.

I'm thinking that the subject of luminous efficacy would be of some interest to you. It interests me even though I understand only a small portion of the overall subject.

One of my favorite lamps is the Welch Alynn WA01166. Check out it's efficacy compared to other Welch Alynn lamps. I know that it runs nicely at 12.5 volts. At it's rated voltage of 11.3V it generates 703.36 bulb lumens. Running it on 11 high drain cells at 13.2 volts pushes it up to 1110.56 bulb lumens and 27 watts.

I run it in a Mag6C with 10 cells for about 12V and 800 bulb lumens. I also run it in a Cold Steel Brute using 11 cells. Good, high drain AA cells will perform similarly. IOW, 11 series in what ever configuration. I believe FiveMega has built a few torches based on the WA01166 in the 3D and smaller form factors.
 
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