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Hi guys. I remain on my quest for the 'ideal' landing light.... In doing so
I've checked out the Pilot PL1062C, PL-1055C and the PL-1057C. I haven't
tested the PL-4040C yet. What I've found on the units I have tested (all
used the 12V 55W halogen bulbs) is that the beam dispersion is WAY too
broad. As a reference point I used the landing bulb (GE #4509) from my
'172. Its specs are: 100W (Electrical power consumption), 110,000
candlepower (light output) rated at 25 hours operation with a beam spread of
12 horiz x 6 vert.
My "Lab" consists of a high current DC source and a country backyard! I
power each bulb and point it at the trees in the distance and at the sky.
The 4509 produces a bright white dot and a clearly sealed beam. The Pilot
units I've tested (and a few others) produce a diffuse illumination....
anything BUT a sharp beam. I'd be curious if you've tested the 4040C and if
so, what your results have been.
FWIW, those interested may be interested in checking out an offering from
Lopresti: the new Lexus / BMW / Audi type Super bright light.
http://www.flyfast-lopresti.com/boom_beam.htm Note the power consumption VS
light output. It implies a MUCH more efficient technology. This translates
to a MUCH cooler bulb. One of the Lopresti folks told me he could hold the
unit in his hand and it ran cool. This could be quite a significant
advantage when it comes to our composite babies! I wouldn't DREAM of trying
to hold the GE 4509 or the Pilot units while in operation! I'd no sooner
enclose such a hot item in such a small, unventilated compartment as my
wingtips or winglets. For those of you unconvinced, just hit a layup with a
heatgun for 15 seconds and see how strong it stays! Humbling. The Lopresti
offering is not without drawbacks including its price!
Ed McCauley
Lancair IV-P
Milford, NJ
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LML homepage: http://www.olsusa.com/Users/Mkaye/maillist.html
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