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.