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Good info Jim,
I once tried to find out how much light car headlights put out to give me
some
indication as to what I might require on a sub, but couldn't come up with
consistent figures.
Alan
----- Original Message -----
Sent: Wednesday, January 18, 2012 6:20
PM
Subject: Re: [PSUBS-MAILIST] SeaBlaze3
LED bench test
Just stumbled across this tonight: Each headlight on
the new Audi A6 contains 57 LEDs. Each low-beam unit consumes only 40
watts. This might be totally useless information, but then
again...
JT
Now you've got me researching
Cliff.
In this comparison chart it says 25-28 watt
leds put out 2,600 lumens.
Lea Nichols is a bit of an expert in this
field, below is a previous post of his that is
informative.
Alan
I'm fond of two, 5000 lumen lights with 60 degree beam spread
for
underwater videography. I use one, 1000 lumen light with 6
degree beam
to find my way around in caves.
HID lights generally
produce slightly more lumens per watt than LEDS but
are fragile,
expensive, slow to warm up, and have a color temperature
around 6000K
(blue). LEDS are available in a range of color
temperatures.
Something around 3600K will make the underwater
landscape prettier.
HID lights optically radiate 20 - 30% of the heat
energy which makes them
easier to cool. In the HID world the
reflector makes a 2:1 difference in
the amount of usable light.
Dimpled bright metal reflectors work the
best. LEDs are available
with various radiation patterns. I've used the
lambertian pattern
to make LED arrays with planar layout like Nuytco's and
it works
great.
Lea Nichols
----- Original Message -----
Sent: Wednesday, January 18, 2012
9:15 AM
Subject: Re: [PSUBS-MAILIST]
SeaBlaze3 LED bench test
The sscp7 LED emitters I have are
rated 900 lumens at 10 watts (manufacturers rating). They are
touted
as being the worlds brightest LED.
Revues by members of the public put them
nearer 750 lumens but still
impressive. The Seablaze 3 is 30 watts so at
a guess put out around 2,400 lumens or less.
Regards Alan
----- Original Message -----
Sent: Wednesday, January 18, 2012
5:28 AM
Subject: Re: [PSUBS-MAILIST]
SeaBlaze3 LED bench test
I see more and more of this, with many manufacturers
now comparing their products light output to some other standard like a
specified wattage of halogen or HID. Too much of "how bright is
this thing" depends upon how far you measure from the source and what
the beam pattern is. If there was enough interest it would be nice
to source a few different types of lighting (halogen, HID, LED) and do a
video comparison of light output for units of similar published
performance. The K600 had round sealed beam automotive
headlights.
Jon
On 1/17/2012 10:04 AM, Cliff Redus
wrote:
Jim, the manufacture does not publish the luminosity of the LED.
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