The truth about lighting - Page 8

mojoreef · 01-27-2004, 12:28 PM

Yea Boomer that exactly what I was going to say

. I just didnt want to steal your thunder, share the wealth so to say

MIke

Boomer · 01-27-2004, 02:50 PM

TG

It works for either, but I messed up wasn't thinkin' late at night. I gave LUX in my example, so that would need to be in m not feet. If I used LUM. 18,200 then I cound have used feet.

It has been corrected

Thanks for showing the error. Also the ISL can get complicated. Did you miss this link I gave. Also click on the book.

http://www.intl-light.com/handbook/ch06.html

Make sure TG you read chapter 7

Scoot

That is a nice little calulator haven't see it thanks. You forgot one though

I gave it earlier though.

1 lumen = 10.76 LUX

Meaning 1 LUMNEN /square foot = 10.76 LUMENS square meter, as there are 10.76 sqaure feet in a sqaure meter and 1 LUMEN in a square foot

All one need to remember is the

1 LUMEN = 10.76 LUX, if you have a LUX value just divide it = by 10.76, i.e

15 LUMENS = 161.4 LUX ( 15 x 10.76)

161.4 LUX = 15 LUMENS (161.4 / 10.76)

Also don't forget that Lumen /m2 is the same as LUX .

40 lumens / m² = 40 LUX

Boomer · 01-27-2004, 03:13 PM

I just didnt want to steal your thunder, share the wealth so to say

Abd I had to share it with TG

Craig Manoukian · 01-27-2004, 03:17 PM

Man I almost understand the lumen/lux examples, scary!

Thanks Boomer

tankgirl · 01-29-2004, 10:27 AM

Scott, ditto, that was a very cool link, Thanks!!!

Boomey, Cheers! I hope there's no quiz, tho'. Another excellently cool link. My undying gratitude, as always! You & Mike are national treasures!

Witfull · 09-12-2005, 12:42 PM

a thought on actinics here, is the reason corals flourese under actinics is it because the are using the light, or are they using just a part of it and the flouresence we see the unwanted portion being reflected back to our eyes?

rckmtl · 09-12-2005, 02:47 PM

"Fluorescence occurs when a substance absorbs light of one wavelength and emits it at a longer wavelength -- often as visible light."

"Fluorescence is the property of certain molecules, or fluorophores, to absorb light at one wavelength and emit a light at a longer wavelength. The incident light excites the molecule to a higher level of vibrational energy. As the molecule returns to the ground state, the excited fluorophore emits a photon. This photon is the fluorescence emission."

I decided not to be lazy today. I rembered that I studied this one a long time ago, but could not remeber how to word the explanation. Fortunatally other people did it for me.

One thing about light, and heat that helped me to understand concepts relating to them is this. To alwys remeber that whatever it is called, light, heat, radiation, ect... it is just a form of energy. If you think about it in terms of being energy it is easier to understand. For me anyway. When I hear the word light, or heat, it brings very specific concepts to my mind. but if I think 'what type of energy is this' or 'how will it react to this type of energy', it makes things a lot simpler.

01-27-2004, 12:28 PM	#106 (permalink)
mojoreef Just a reefer Join Date: Nov 2003 Location: Washington State Posts: 1,176 View Gallery Karma Komment	Yea Boomer that exactly what I was going to say . I just didnt want to steal your thunder, share the wealth so to say MIke __________________ Make sure you check out The Fish Gallery The Coral Gallery The Equipment Gallery

01-27-2004, 02:50 PM	#107 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,072 View Gallery Karma Komment	TG It works for either, but I messed up wasn't thinkin' late at night. I gave LUX in my example, so that would need to be in m not feet. If I used LUM. 18,200 then I cound have used feet. It has been corrected Thanks for showing the error. Also the ISL can get complicated. Did you miss this link I gave. Also click on the book. http://www.intl-light.com/handbook/ch06.html Make sure TG you read chapter 7 Scoot That is a nice little calulator haven't see it thanks. You forgot one though I gave it earlier though. 1 lumen = 10.76 LUX Meaning 1 LUMNEN /square foot = 10.76 LUMENS square meter, as there are 10.76 sqaure feet in a sqaure meter and 1 LUMEN in a square foot All one need to remember is the 1 LUMEN = 10.76 LUX, if you have a LUX value just divide it = by 10.76, i.e 15 LUMENS = 161.4 LUX ( 15 x 10.76) 161.4 LUX = 15 LUMENS (161.4 / 10.76) Also don't forget that Lumen /m2 is the same as LUX . 40 lumens / m² = 40 LUX __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be. Last edited by Boomer : 01-27-2004 at 03:25 PM.

01-27-2004, 03:13 PM	#108 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,072 View Gallery Karma Komment	I just didnt want to steal your thunder, share the wealth so to say Abd I had to share it with TG __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.

01-27-2004, 03:17 PM	#109 (permalink)
Craig Manoukian Regular Guy Moderator Join Date: Nov 2003 Location: Marina Del Ray, CA Posts: 17,911 View Gallery Karma Komment Add yours!	Man I almost understand the lumen/lux examples, scary! Thanks Boomer __________________ Currently tankless. 20 Gallon mini reef with mated pair of Maroon Clowns given to Rougiem! 80 gallon reef given to Rougiem/Wooster HS.

09-12-2005, 02:47 PM	#112 (permalink)
rckmtl Serpent Star Join Date: Mar 2005 Location: Aurora, Illinios Posts: 231 View Gallery Karma Komment	Re: The truth about lighting "Fluorescence occurs when a substance absorbs light of one wavelength and emits it at a longer wavelength -- often as visible light." "Fluorescence is the property of certain molecules, or fluorophores, to absorb light at one wavelength and emit a light at a longer wavelength. The incident light excites the molecule to a higher level of vibrational energy. As the molecule returns to the ground state, the excited fluorophore emits a photon. This photon is the fluorescence emission." I decided not to be lazy today. I rembered that I studied this one a long time ago, but could not remeber how to word the explanation. Fortunatally other people did it for me. One thing about light, and heat that helped me to understand concepts relating to them is this. To alwys remeber that whatever it is called, light, heat, radiation, ect... it is just a form of energy. If you think about it in terms of being energy it is easier to understand. For me anyway. When I hear the word light, or heat, it brings very specific concepts to my mind. but if I think 'what type of energy is this' or 'how will it react to this type of energy', it makes things a lot simpler. __________________ -Ellen- Where did all the water go...

01-29-2004, 10:27 AM	#110 (permalink)
tankgirl Reef Lobster Join Date: Nov 2003 Location: So. Ca Posts: 1,476 View Gallery Karma Komment	Scott, ditto, that was a very cool link, Thanks!!! Boomey, Cheers! I hope there's no quiz, tho'. Another excellently cool link. My undying gratitude, as always! You & Mike are national treasures!

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