Light intensity on the Earth surface

[Pszemol]

Anybody here has some data for the amount of light that hits
the earth (ocean?) surface in the tropical areas? How much
of that is ultraviolet? How does that compare to amount
of light from MH/HQI bulbs not protected with "UV stop"?

BTW - Does UV penetrate sea water significantly?

[Harald]

"Pszemol" > wrote in message
...
> Anybody here has some data for the amount of light that hits
> the earth (ocean?) surface in the tropical areas? How much
> of that is ultraviolet? How does that compare to amount
> of light from MH/HQI bulbs not protected with "UV stop"?
>
> BTW - Does UV penetrate sea water significantly?

I believe it equates to roughly 750 W per square meter

UV does not penetrate water. Like glass, water will block UV.

hth

--
Harald
130 g Skimmerless SW Tank
290 lbs/6" DSB
70 lbs LR
3 B/G Chromis, 1 Tomato Clown, 1 Lawnmower Blenny, 1 Flame Angel, 1 Foxface,
1 Blue Regal, 1 Royal Gramma, 1 Cleaner Wrasse, 3 soft corals.


33 gal Skimmerless SW Nano
80 lbs/6" DSB
39 lbs LR,
1 - 3-Striped damsel, 1 Blue Devil, 1 sm. Yellow Tang

[Boomer]

UV light most certainly will penetrate water. That is how corals get burned with MH
lamps.Glass is not a complete blocker either and Borosilcate Glass blocks UV better than
most other glasses

--
Boomer

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If You See Me Running You Better Catch-Up
"Harald" > wrote in message news:25ENb.22373$n44.13034@clgrps13...
: "Pszemol" > wrote in message
: ...
: > Anybody here has some data for the amount of light that hits
: > the earth (ocean?) surface in the tropical areas? How much
: > of that is ultraviolet? How does that compare to amount
: > of light from MH/HQI bulbs not protected with "UV stop"?
: >
: > BTW - Does UV penetrate sea water significantly?
:
: I believe it equates to roughly 750 W per square meter
:
: UV does not penetrate water. Like glass, water will block UV.
:
: hth
:
: --
: Harald
: 130 g Skimmerless SW Tank
: 290 lbs/6" DSB
: 70 lbs LR
: 3 B/G Chromis, 1 Tomato Clown, 1 Lawnmower Blenny, 1 Flame Angel, 1 Foxface,
: 1 Blue Regal, 1 Royal Gramma, 1 Cleaner Wrasse, 3 soft corals.
:
:
: 33 gal Skimmerless SW Nano
: 80 lbs/6" DSB
: 39 lbs LR,
: 1 - 3-Striped damsel, 1 Blue Devil, 1 sm. Yellow Tang
:
:

[Boomer]

Psz, just for you :-)

Ocean studies

http://krupp.wcc.hawaii.edu/BIOL200/powerpnt/envrfact/

http://www.animalnetwork.com/fish2/aqfm/1999/july/features/2/default.asp

http://www.oceansonline.com/light_in_the_sea.htm

http://illuminations.nctm.org/imath/912/Light/student/light2.html

http://csep10.phys.utk.edu/guidry/java/wien/wien.html

http://www.oceansonline.com/light_in_the_sea.htm

http://www.petsforum.com/personal/trevor-jones/photosynthesis.html

http://www.animalnetwork.com/fish2/aqfm/1999/june/product/default.asp

Bulbs

http://members.misty.com/don/f-spec.html

http://www.coralreefecosystems.com/ltg_bulb_color.htm

http://www.advancedaquarist.com/issues/oct2002/feature.htm

http://www.animalnetwork.com/fish2/aqfm/1998/nov/features/1/default.asp

http://www.animalnetwork.com/fish2/aqfm/1998/nov/features/1/default.asp

http://www.advancedaquarist.com/issues/nov2002/feature2.htm

http://www.aquariumpros.com/faqpro/lighting_1.shtml



There will be a test on Monday, sorry to take up all your weekend free time
--
Boomer

Want to talk chemistry ? The Reef Chemistry Forum
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If You See Me Running You Better Catch-Up
"Pszemol" > wrote in message ...
: Anybody here has some data for the amount of light that hits
: the earth (ocean?) surface in the tropical areas? How much
: of that is ultraviolet? How does that compare to amount
: of light from MH/HQI bulbs not protected with "UV stop"?
:
: BTW - Does UV penetrate sea water significantly?

[Boomer]

Psz, just for you :-)

Ocean studies

http://krupp.wcc.hawaii.edu/BIOL200/powerpnt/envrfact/

http://www.animalnetwork.com/fish2/aqfm/1999/july/features/2/default.asp

http://www.oceansonline.com/light_in_the_sea.htm

http://illuminations.nctm.org/imath/912/Light/student/light2.html

http://csep10.phys.utk.edu/guidry/java/wien/wien.html

http://www.oceansonline.com/light_in_the_sea.htm

http://www.petsforum.com/personal/trevor-jones/photosynthesis.html

http://www.animalnetwork.com/fish2/aqfm/1999/june/product/default.asp

Bulbs

http://members.misty.com/don/f-spec.html

http://www.coralreefecosystems.com/ltg_bulb_color.htm

http://www.advancedaquarist.com/issues/oct2002/feature.htm

http://www.animalnetwork.com/fish2/aqfm/1998/nov/features/1/default.asp

http://www.animalnetwork.com/fish2/aqfm/1998/nov/features/1/default.asp

http://www.advancedaquarist.com/issues/nov2002/feature2.htm

http://www.aquariumpros.com/faqpro/lighting_1.shtml



There will be a test on Monday, sorry to take up all your weekend free time


--
Boomer

Want to talk chemistry ? The Reef Chemistry Forum
http://www.reefcentral.com/vbulletin/index.php

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If You See Me Running You Better Catch-Up
"Pszemol" > wrote in message ...
: Anybody here has some data for the amount of light that hits
: the earth (ocean?) surface in the tropical areas? How much
: of that is ultraviolet? How does that compare to amount
: of light from MH/HQI bulbs not protected with "UV stop"?
:
: BTW - Does UV penetrate sea water significantly?

[Marc Levenson]

At least that is shorter than the 279 page PDF sent to you earlier today!

Marc


Boomer wrote:

> Psz, just for you :-)
>
> Ocean studies
>
> http://krupp.wcc.hawaii.edu/BIOL200/powerpnt/envrfact/
>
> http://www.animalnetwork.com/fish2/aqfm/1999/july/features/2/default.asp
>
> http://www.oceansonline.com/light_in_the_sea.htm
>
> http://illuminations.nctm.org/imath/912/Light/student/light2.html
>
> http://csep10.phys.utk.edu/guidry/java/wien/wien.html
>
> http://www.oceansonline.com/light_in_the_sea.htm
>
> http://www.petsforum.com/personal/trevor-jones/photosynthesis.html
>
> http://www.animalnetwork.com/fish2/aqfm/1999/june/product/default.asp
>
> Bulbs
>
> http://members.misty.com/don/f-spec.html
>
> http://www.coralreefecosystems.com/ltg_bulb_color.htm
>
> http://www.advancedaquarist.com/issues/oct2002/feature.htm
>
> http://www.animalnetwork.com/fish2/aqfm/1998/nov/features/1/default.asp
>
> http://www.animalnetwork.com/fish2/aqfm/1998/nov/features/1/default.asp
>
> http://www.advancedaquarist.com/issues/nov2002/feature2.htm
>
> http://www.aquariumpros.com/faqpro/lighting_1.shtml
>
> There will be a test on Monday, sorry to take up all your weekend free time
>
> --
> Boomer
>
> Want to talk chemistry ? The Reef Chemistry Forum
> http://www.reefcentral.com/vbulletin/index.php
>
> Want to See More ?
> Please Join Our Growing Membership
> www.coralrealm.com
>
> If You See Me Running You Better Catch-Up
> "Pszemol" > wrote in message ...
> : Anybody here has some data for the amount of light that hits
> : the earth (ocean?) surface in the tropical areas? How much
> : of that is ultraviolet? How does that compare to amount
> : of light from MH/HQI bulbs not protected with "UV stop"?
> :
> : BTW - Does UV penetrate sea water significantly?

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com

[Pszemol]

"Boomer" > wrote in message ...
[..]
> There will be a test on Monday, sorry to take up all your weekend free time

I was asking just for that... :->
Great thanks, Boomer - you are the best! :-D