Re: Anyone moved to LED Lighting?

[Joe Pfeiffer <pfeiffer@xxxxxxxxxxx>]

salty@xxxxxxx writes:

> On Sat, 21 Nov 2009 14:37:57 -0500, "Robert L Bass"
> <Sales@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
>>salty wrote:
>>>
>>> ... The simple answer is that most LED replacements
>>> for incandesent bulbs in almost ANY application other
>>> than indicator lights on a panel,  are accomplished by
>>> use of arrays of LED's, not a single LED.
>>
>>Therein lies the problem.  Lamp housings using reflectors or prismatic lenses
>>for nav lights and other purposes are designed to use a light coming from a
>>single point.
>
> You are already off course. ;-)

Umm...  you know boats and I don't, but when talking about automotive
taillights he's exactly correct.

>>Incandescent bulbs do that rather well.  An LED array can't work
>>as well in that type of lamp because only a few of the LEDs are at the focal
>>point.  Light emitted from the rest of the LEDs will be scattered in wrong
>>directions.
>
> Way off course. The alarms are now sounding and crew are running up on
> deck.

No...  exactly correct for autos.

>>That does not mean that LEDs can't serve well in nav lights -- only that they
>>don't work well as replacements for standard bulbs in *existing* lamps.
>
> Not true. As I said, they have to perform to strict legal standards -
> and they do. I did not replace any fixtures for my nav lights. All
> done with drop in LED arrays made to completely and legally reproduce
> the same or better light. Couldn't do it if they didn't comply. LED's
> can be mounted in arrays on the surface of any shape in order to give
> full brightness in all directions needed. They individually have a
> fairly narrow beam, but you simply mount a bunch of them so that the
> beams overlap. I'm not speculating about this. I have them on my
> sailboat. So do a lot of other folks.

This I can readily believe -- but that's absolutely not what the
automotive "replacements" that try to drop a bunch of LEDs in to replace
an 1157 are like.
--
As we enjoy great advantages from the inventions of others, we should
be glad of an opportunity to serve others by any invention of ours;
and this we should do freely and generously. (Benjamin Franklin)