In . com, Pete C. wrote:

wrote:

On Fri, 20 Nov 2009 14:36:32 -0500, "Josepi" wrote:

Not according to testing labs that have made lumen mesurements. Are you
including the inverters or other lossy type gadgets to accomodate
different types of bulbs?

No inverters or "lossy gadgets" involved, other than what is built
into the base of the lamps. The draw measured includes any and all
parts of the assembly.

Have you actually measured the "equivalent" light output or
does it just look about the same?

Measured. Nav lights have to meet strict legal requirements and be
certified.

Brilliance is a logarithmic scale and can
be very deceiving to the human eye.

You really can't stand being wrong, can you?

Trouble with the lab measurements is they are not usually dated when
completed and the technology advances quite rapidly.

Sorry that you have such a hard time with reality.

LEDs are considerably more efficient than ordinary incandescents, but
they are still less efficient than CFLs. Many of the fixtures you'd be
using on a boat benefit from the directionality of LEDs, which is
another reason they perform better.

There are now white LEDs more efficient than CFLs - but this level of
efficiency is largely limited to cool white ones without high color
rendering index, or to laboratory prototypes.

Nav lights involve colored lights, and LEDs have an extra advantage
there from the fact that there are efficient LEDs specializing in
producing one color or another of light. Incandescent red and green nav
lights have filters that remove something like 70% of the light.

- Don Klipstein )