1274 vs. 1185 on 7-8 cells. Opinions?

Being on a budget, I can only build one light now, and with the availabilty of the 8AA to 2D setups I ordered one. So this will be in a 2D Mag on Lenmar 2000's.

What will give more output, search didn't help much. 1274 bulb on 7AA's, or a 1185 on 8? Eventually the 1185 will get it's own Mag 85 3D. But which will have more output for now?
thanks in advance, ~Tim

This is where things get complicated.
Lenmar 2000's often won't fit 4 across in a 2D mag.
I tried. /ubbthreads/images/graemlins/banghead.gif
They are just a hair too wide. /ubbthreads/images/graemlins/frown.gif
Rayovac 1800's will fit easily though.
I would kinda lean toward a 8AA 1185 setup.
I have one and love it.
But keep an 1174 for the day when 1 AA bites the dust and you are down to 7AA's and a dummy cell. /ubbthreads/images/graemlins/wink.gif

Just my 2 cents. /ubbthreads/images/graemlins/wink.gif

1111 on 6 Volts 5 Cells (Spec) 465 Lumens
1111 on 7.2 Volts 6 Cells 880 Lumens

1274 on 7.2 Volts 6 Cells (Spec) 553 Lumens
1274 on 8.4 Volts 7 Cells 946 Lumens

1185 on 9.6 Volts 8 Cells 817 Lumens
1185 on 10.8 Volts 9 Cells 1234 Lumens

The 1274 makes about 130 Lumens more on 7 cells than the 85 does on 8. In reality, that isn't very noticeable so far as output goes, BUT the 1274 will be noticeably whiter.

You will notice it more if one is more focused than the other. For me, the 1111 tends to focus a little tighter than the 1274 or the 1185, if that matters to you.

Bill

Hmm, according to Modamag's adapter sheet http://www.candlepowerforums.com/ubbthreads/printthread.php?Board=groupbuy&main=736404&type=post

they listed the Lenmar's as fitting tightly. Guess I'll find out soon enough. /ubbthreads/images/graemlins/smile.gif Thanks for those lumen reading, just what I've been searching for.
~Tim

Let me double the thanks on that chart, Bwaites. That's exactly what I've been looking for, for a while now. Just never seemed to be able to find it.

Larry

Hi Bill,
Are those figures arrived at from a formula or just the info on the package. I hear about certain formulas used to calculate certain values and wondered if this was one of those.

BTW what are several of the most basic formulas in the world of flashlighting and electronics as in applies thereto.

TIA,
vhyper

The stock numbers are published by WelchAllyn.

The overdrive numbers are a calculation that has proven to be accurate at relatively low overdrives such as those here. The formula starts to break down at higher overdrive rates, I am told.

Ginseng can give you the formula, I can't find it right now.

Bill

Formula: (Vh/Vl)^3.5*Lm
Vh=Overdriven voltage
Vl=Spec voltage
Lm=Spec lumens

You can do the rerating for WA bulbs at WA's site by using the following link and then replace the bulb number in the partnumber parmeter and the desired overdrive voltage in the V2 paramter:
http://www.walamp.com/lpd/webstore/rerate.tpl?action=rerate&&L2=0&adj=5&V2=8.4&partnumber=01274-U
You will get both rerated color temperature and estimated bulb life by using this method. The only thing you don't get is rerated current.

Sigbjoern

Ok, for us non math majors, whats that carrot mean?

It's been nearly 25 years since college algebra and trig.

Bill

^ means power of
You need a good calculator to be able to calculate fractional powers.

Sigbjoern

Bill and Sigbjoern, thanks for your input.
Yeh, fractional exponents can be kinda tricky. Has been a long time for me also.

Sincerely,
vhyper

x^3.5 = x to the power 3.5 = x times x times x times sqrt(x).

You can use that last formula if your calculator doesn't have fractional powers but does have square root.

Looking good. For the 7-8 cell range, I prefer the WA01274.

1) It's marginally brighter and noticeably whiter.
2) It runs at a lower current demand thus longer runtime. Maybe by about 10%

Both the WA01185 and especially the WA01111 will draw higher current shortening your runtime.

Wait, did I just hear myself talking about runtime? /ubbthreads/images/graemlins/grin.gif

Wilkey

Yup, the Lenmar's are a bit too close for comfort in the adapter. They should work fine to be built into Mag 85 9 cell packs tho. Now I need to trade some of 'em off for Rayovac 1800's.....

will 1274 run on 8x AA? insta-flash???

[ QUOTE ]
cy said:
will 1274 run on 8x AA? insta-flash???

[/ QUOTE ]

Very high likelihood tending toward certainty. Yup.

Wilkey