When I put a gps on my Catalina and o day I simply put transducer lorance fish 
finder  in toilet plug wax making sure no air bubbles and I got good depth 
readings

Peter 
Goonie island C&c 40

Sent from my iPhone

> On Sep 4, 2017, at 1:27 PM, Steve Thomas via CnC-List <cnc-list@cnc-list.com> 
> wrote:
> 
> So, your type 1891 incandescent lamp is rated at 2 spherical candle power, 
> which is equivalent to 25 lumens. 
> 
> ---- Steve Thomas via CnC-List <cnc-list@cnc-list.com> wrote: 
> This link to a GE miniature lamp catalog contains a wealth of information. 
> Brightness is expressed in "spherical candlepower", where one candela is 
> approximately equal to 12.5 lumens. Don't get distracted by sites with purist 
> definitions, this is close enough for farm use in this context. 
> 
> http://www.csobeech.com/files/GE-BulbCatalog.pdf
> 
> Steve Thomas
> C&C27 MKIII
> Port Stanley, ON
> 
> ---- "Dennis C. via CnC-List" <cnc-list@cnc-list.com> wrote: 
> I replaced the bulb in Touche's binnacle compass this weekend.  Really
> wanted to look at an LED bulb but got hung up on the brightness.  I just
> replaced it in kind from an auto parts store.
> 
> The original bulb was a trade number 1891, 3.4W, 12 VDC mini-bayonet (BA9S)
> base.  It's not difficult to find the correct base and height but
> determining the brightness is confusing.  I don't need a compass light that
> can be seen by the International Space Station.
> 
> The new specification for LED bulbs is in lumens.  I did some quick
> research on the Web but couldn't find a reliable conversion for watts 12
> VDC to lumens.  Found some sites for 120 VAC but not 12 VDC.
> 
> So, how many lumens is a 3.4 watt 12 VDC bulb?
> 
> Has anybody found a decent website for converting watts 12 VDC to lumens?
> 
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
> 
> 
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