On Sat, 21 Dec 2013 14:43:53 -0000, "Arfa Daily"
wrote:



"Congoleum Breckenridge" wrote in message
...
On 12/19/2013 9:09 PM, Arfa Daily wrote:


"Congoleum Breckenridge" wrote in message
...
On 12/17/2013 8:49 AM, amdx wrote:


Mikek

Cree has a 75w LED bulb coming out soon.



75 watt actual or 75 watt equivalent ... ? :-)

Arfa
equivalent


Ah, good ! I was just thinking that there was going to be an epidemic of
people going blind ... :-)

Arfa

I have a lighting fixture for you, about 235 W LED, something like 8,000
lumens, meant for roadway lighting. And there are even bigger brighter
ones.

?-)

On Sat, 21 Dec 2013 10:35:43 -0800, dave wrote:

On 12/21/2013 10:09 AM, Arfa Daily wrote:


"Leif Neland" wrote in message
...
dave forklarede:

40W appliance bulbs and 130V 100W aviation lamps will be around
forever, for quick example. 3-way lamps are also exempt, and some of
them go to 300W. I am going to build a 3 way bulb current limiter.
Right now I have to change bulbs depending on the expected current draw.


"130V 100W aviation lamps"? Why would you not want to use LEDS here?

Leif

--
Husk kørelys bagpå, hvis din bilfabrikant har taget den idiotiske
beslutning at undlade det.


I was thinking that. LEDs would have to be more reliable I would have
thought, and in a place where reliability is of paramount importance,
surely, that would be a good thing ?? As to my comments about the 75
watt LED, I was being facetious. As in an LED fixture that consumed 75
watts would be blinding. I have some 10 watt white LEDs, and you don't
even want to look at them obliquely, let alone anything like straight on
...

Arfa

I'm not sure there is an FAA spec for LED lampage.

There are. Also USGC standards for LED navigation lights.

Strobes are legal
if you turn them way up in the daytime, or paint your structure with
alternating white and orange stripes.

Still, these are the lights that don't flash and they are built to last
a long time. Killer bulbs.

Yep. and i have also seen navigation lighting fixtures that included
automated lamp changers.

The 250 Watt beacons are the lights that flash. They have fresnel
lenses and other beam forming requirements. There's a video of Bob
Silliman changing a beacon on the Empire State BUilding on YouTube.

On Tue, 17 Dec 2013 12:47:43 -0800, Joe wrote:

In article ,
"Arfa Daily" wrote:

snip
with a similar CRI and in a
package that doesn't look like it belongs in The Jetsons ...

What is "CRI" ?

--- Joe

Color Rendering Index, how close it come to a black body source of the
same color temperature rating.

?-)