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.