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Search: Keyword(s): ; Posts Made By: jeffkrol
Forum: Lighting Yesterday, 09:47 PM
Replies: 11
Views: 133
Posted By jeffkrol
From a "Hoppy Study" ...

From a "Hoppy Study"
http://i573.photobucket.com/albums/ss176/Hoppycalif/EffectofWater-1.jpg

http://www.plantedtank.net/forums/showthread.php?t=184368

Granted only 5"
Forum: Lighting Yesterday, 07:33 PM
Replies: 3
Views: 83
Posted By jeffkrol
http://www.aquatraders.com/LED-Aquarium-Lighting-B...

http://www.aquatraders.com/LED-Aquarium-Lighting-Beamswork-Freshwater-Plant-p/56426p.htm
This is about "2 bulbs" worth..
Forum: Lighting Yesterday, 06:53 PM
Replies: 11
Views: 133
Posted By jeffkrol
Ok first that video has a heavily tannen-ed tank...

Ok first that video has a heavily tannen-ed tank so there is a lot of blue absorption


Secondly "other numbers" IN a tank..

...
Forum: Lighting Yesterday, 05:44 PM
Replies: 11
Views: 133
Posted By jeffkrol
AFAICT that is a stingray..and weaker than any of...

AFAICT that is a stingray..and weaker than any of the 2 you mentioned.

Here is an "in water" measurement of a Planted plus:...
Forum: Lighting Yesterday, 04:44 PM
Replies: 11
Views: 133
Posted By jeffkrol
The through air figures will be close enough....

The through air figures will be close enough. There is some basis to assume they are a bit low due to tank glass reflections and water refraction.
Then they may be a bit low due to absorption of...
Forum: Equipment Yesterday, 04:34 PM
Replies: 8
Views: 255
Posted By jeffkrol
no, just a high curiosity quotient.. Freshwater...

no, just a high curiosity quotient..
Freshwater aquariums kind of tie a bunch of intellectual curiosities together..

Also the amount of info (good, bad and ugly) on the internet is really a...
Forum: Lighting Yesterday, 04:07 PM
Replies: 385
Views: 164,809
Posted By jeffkrol
I'm confused why youare wondering about the PAR...

I'm confused why youare wondering about the PAR of 2 bulbs.. You have 6.
Forum: Lighting Yesterday, 03:58 PM
Replies: 223
Views: 14,642
Posted By jeffkrol
since I DIY, I can't participate in this ...

since I DIY, I can't participate in this aspect.. but FOR fun I looked for something equiv. to my STYLE ;)


found this;...
Forum: Lighting Yesterday, 03:51 PM
Replies: 3
Views: 125
Posted By jeffkrol
The 3W are 90 degree lenses (pop off the lenses...

The 3W are 90 degree lenses (pop off the lenses and you are at 120).. the .5W are set at 120.
your tank is 21" wide? 18" deep?

The quad is a lot of light.. and the 72 w/ just 6500k is hard to...
Forum: Lighting Yesterday, 03:33 AM
Replies: 15
Views: 264
Posted By jeffkrol
Err.. no I ran into the image..which was used in...

Err.. no I ran into the image..which was used in another "can you dim a Finnex" thread here ..

As to standard constant voltage wiring of leds.. 3 in series w/ a resistor then a bunch of these...
Forum: Lighting 03-25-2015, 09:42 PM
Replies: 15
Views: 264
Posted By jeffkrol
Ran into this today.. A Finnex (at least that is...

Ran into this today.. A Finnex (at least that is what I believe) w/ a cord and no separate power supply. Will give you an idea of the challenge, though probably not that hard..somewhat discouraged...
Forum: Lighting 03-25-2015, 08:16 PM
Replies: 1
Views: 80
Posted By jeffkrol
1 foot off the water at 90 degrees is a cone of...

1 foot off the water at 90 degrees is a cone of 2ft for one row..
For 2 fixtures 75 is better..18" cone for one. all depends on the width of the tank and if you want full coverage at the surface or...
Forum: Lighting 03-25-2015, 08:09 PM
Replies: 15
Views: 465
Posted By jeffkrol
black right??? ...

black right??? :icon_twis:icon_twis:icon_twis:icon_twis:icon_twis:icon_twis
Forum: Equipment 03-25-2015, 05:05 PM
Replies: 8
Views: 255
Posted By jeffkrol
Actually you can predict losses: ...

Actually you can predict losses:
http://www.coleparmer.com/TechLibraryArticle/700
silicone 20,132 : Permeability (approx)†
Units: {cc-mmsec-cm2-cm Hg } x 10-10

Of course translating that is a...
Forum: Lighting 03-25-2015, 04:48 PM
Replies: 20
Views: 385
Posted By jeffkrol
Their recommended "footprint" is 24" square area ...

Their recommended "footprint" is 24" square area
Ideally you will need 2.

At that rate, though def. not as cool looking, something like this is more "practical"...
Forum: DIY 03-25-2015, 01:30 PM
Replies: 7
Views: 223
Posted By jeffkrol
Typhon has a 10V PWM output, so yes the...

Typhon has a 10V PWM output, so yes the HLN-60H-30 "should" work with it.
the HLN is both power supply and constant current driver in one..

BTW: Dimming is accomplished (no matter the method or...
Forum: Lighting 03-25-2015, 03:37 AM
Replies: 20
Views: 385
Posted By jeffkrol
you never mentioned what size tank..

you never mentioned what size tank..
Forum: Lighting 03-24-2015, 10:56 PM
Replies: 15
Views: 465
Posted By jeffkrol
I know. I just wanted to poke you a bit.. ;) ...

I know. I just wanted to poke you a bit.. ;)


http://aob.oxfordjournals.org/content/early/2011/09/06/aob.mcr236.full

BTW: That 2700K is a nice spectrum.. I need to see it alone..Those are the...
Forum: Lighting 03-24-2015, 08:02 PM
Replies: 15
Views: 465
Posted By jeffkrol
http://www.travel-images.com/pht/brazil394.jpg ...

http://www.travel-images.com/pht/brazil394.jpg

I'm not sure why you wouldn't want it........... LOL :confused1::confused1::biggrin::biggrin::biggrin::
...
Forum: Lighting 03-24-2015, 07:06 PM
Replies: 15
Views: 465
Posted By jeffkrol
PAR wise yea but you can't get that nice warm...

PAR wise yea but you can't get that nice warm glow w/ "just" 2700K

http://www.qualiteitems.com/images/warmglow.jpg
Forum: Lighting 03-24-2015, 06:33 PM
Replies: 15
Views: 465
Posted By jeffkrol
black is a better radiator .. But w/ active...

black is a better radiator .. But w/ active cooling it makes little difference..
as to the reds.. you miss the cool color.. ;)
you have separate blue, and separate "green" but all you have is...
Forum: DIY 03-24-2015, 05:12 PM
Replies: 7
Views: 223
Posted By jeffkrol
no, that is more of a constant voltage power...

no, that is more of a constant voltage power supply. Besides if you look at the de-rating curve for the enclosed unit, it starts losing power around 28V plus or minus.

HLN-60H-30 would work..
...
Forum: Lighting 03-24-2015, 04:57 PM
Replies: 385
Views: 164,809
Posted By jeffkrol
That is my assumption as well.. ;)

That is my assumption as well.. ;)
Forum: Lighting 03-24-2015, 04:52 PM
Replies: 15
Views: 465
Posted By jeffkrol
REALLY... ;) Odd question: Are you worried...

REALLY... ;)
Odd question:
Are you worried about the bluefin "cloud" disappearing?? Or going "shudder" subscription?

Why white? Black is a better radiator..

you KNOW I have to say it? Where...
Forum: Lighting 03-24-2015, 04:46 PM
Replies: 385
Views: 164,809
Posted By jeffkrol
LiCor is university standard for PAR.. I'm sure...

LiCor is university standard for PAR.. I'm sure Finnex didn't want a spectroanalysis
http://www.jstor.org/discover/10.2307/2389327?sid=21106227547913&uid=3739976&uid=2&uid=4&uid=3739256

Point is...
Showing results 1 to 25 of 250

 
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