RE: Butane lighters unite

["Duff, Ian" <IDuff@charter.com>]

Would it perhaps make sense to add at what distance the measurements
were taken? If so, perhaps take measurements fairly close, like 5 feet,
at a middle distance, like maybe 200 feet, and at a longer distance,
like 500 feet. Then there's the issue of high vs. low beams, on-center
vs. off by some repeatable angle, etc.

Just my US$0.02, to add to an already cluttered discussion. I think
Phil's measurements are the first real "mine's bigger. No mine is, it's
xxx lumens at 5 feet, on center, on low beams, measured with a yyy
meter" contribution to this "discussion".

------------------------------------------------------------------------
-
Ian Duff, 1990 Coupe quattro 20v, Red/Black
quattro Owners Club member P877

Home: New Bedford, MA, USA
Work: Charter Systems, Inc., West Newton, MA, USA
------------------------------------------------------------------------
-

>----------
>From: 	quk@sievers.com[SMTP:quk@sievers.com]
>Subject: 	Butane lighters unite
>
><<snippage>>
>Verifable presumes comparable.  The only meters I have that are up to the
>task 
>are a Copal Sekonic View Spot and a Lunasix 3.  Despite the comparative 
>unsophistication of the latter, it's the one I would propose using in its 
>incident light mode - see the underside. It's fairly readily available to 
>anyone in the business
><<more snippage>>
>Checking the quad Euros in the Coupe GT (55 watts) the peak reading I can get
>on low beam is 17 on the Lunasix scale, or around 11000 lux.  On the quattro 
>(_real_ Euros with 100w low beams) I get around 18 1/3, or around 30000 lux.
> 
>Full scale on the Lunasix is 22 (350000 lux) so it has the range required for
>the job.
><<yet more snippage>>
>I was quite _amazed_ to find the cutoffs for both the Coupe GT and the ur-
>quattro as sharp as they are.  The active area of the meter (about 1/3"
>across) 
>is _big_ compared to the slope of the cutoff.  Raising the meter by less than
>an inch at five feet shows the light value dropping by five stops - 30:1. 
>