Surefire 9P Turbohead lamp question

tja343

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hi,
I am new to the site but like anyone else on this site addicted to flashlights, anyhow, i was just wondering if it is possible to use the Lumens Factory EO-M3T Extreme Output 9 volts, 450 Lumens Lamp Assembly for SureFire M3T in the SF 9P Turbohead reflector, because it is the same voltage requirments. The only thing i am not sure on reflector size, it looks very close to the M3T's but not quite sure.

It would be great if anyone could get back to me on this. I am just amazed at how much brighter/and or longer runtimes these lamps have compaired to the surefire brand lamps.

Surefire also seems pretty slow to restock their 9volt turboheads, it's been like over 6 months.
Thanks, Travis
 

DM51

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The 9P takes the KT2 head, and the M3T takes the KT4 head. However these both accept the same size LA, the MN series with the long rather than short shaft. The EO-M3T will therefore work in your 9P's turbohead.

You should be aware however that SF and LF use different methods of calculating output in lumens.

LF give a figure for "bulb lumens", i.e. the total lumens emitted by the bulb, which in their case is perfectly reasonable as they manufacture bulbs rather than lights. Most light manufacturers quote bulb lumens too.

A small handful of light manufacturers use "torch lumens", which is the figure for the light that actually emerges from the front of the light (after reflector losses etc). Approx 1/3 lumens are lost in this way, so the torch lumens figure is typically 2/3 the figure for bulb lumens.

Surefire takes into account the total light output over the lifetime of a set of cells, i.e. an averaged output, taking into account the fading of the cells as they run down. Their figure is therefore even more conservative than torch lumens.

Very roughly (and I stress this is approximate) 350 bulb lm = 230 torch lm = 180 SF lm.

What this means is that a SF bulb rated at 180 lm will seem as bright as a LF one rated at 350 lm.
 

kelmo

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I don't have any LF LAs. But the MN16 LA puts out a very impressive amount of light. I prefer the MN15 for the longer runtime and the output is quite satisfying.

kelmo
 

tja343

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Thanks for your help, this changes my decisions, though the LF lamps are generally cheaper.
 

waterboiler

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The run time of these lamps is poor on primary cells, so that keeps me conservative as to when/how much I use them.

Look into LiON cells, the MN15 works great on 2 AW 17500 cells in a 9P/M3 style SF light. Run time is a bit less than an hour but being rechargable - who cares ! Guilt free lumens - LiONs really brought my 3 cell SF lights to life for me.
 

mdocod

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By my calculations the MN16 is going to be about the same as a EO-M3T if you compare them both on primary CR123s, if you run them on a pair of li-ion cells, the MN16 will be brighter than the EO-M3T, but they are both in the same ballpark on paper, which won't equate to much if any noticeable difference in actual use.
 

tja343

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ok, one other question, if i where to use the MN60 (225 lumens) or MN61 (350 lumens) lamps in the KT2 turbohead (9P with a cell extender to make it 12 volts) would it beable to handle it or is the KT2 made to only handle 105-200 lm lamps?
 

BSBG

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The KT head will work with the MN60-MN61 just fine.

Mark

Agreed. In fact, there is an argument that the non Millenium heads are better due to their superior heat sinking, at the expense of shock isolation, of course.
 

tja343

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sweet,
thanks for your help everyone, i will post some pics when i get it shipped to me if the kt2 ever comes back in stock
 
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