The Planted Tank Forum - Search Results
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Search Forums

Showing results 1 to 25 of 123
Search took 0.15 seconds.
Search: Keyword(s): ; Posts Made By: defdac
Forum: Lighting 04-20-2013, 09:55 AM
Replies: 20
Views: 4,514
Posted By defdac
3D light calculator is finished after 3 years in development

It's finished, albeit only a couple of lamps added and one reflector:
http://lightcalculator-hrd.appspot.com/

More lamps will be added by users and me. I will transfer some of the lamps from the...
Forum: Lighting 12-14-2011, 09:02 PM
Replies: 20
Views: 4,514
Posted By defdac
The specsheets is all I use. LED:s are a bit...

The specsheets is all I use. LED:s are a bit tiresome to add since it involves alot of reading and decide what current is interesting for hobbyists. Some like to invest less in diodes and overdrive...
Forum: Lighting 12-14-2011, 08:24 AM
Replies: 20
Views: 4,514
Posted By defdac
It the total PAR on the bottom of the tank for...

It the total PAR on the bottom of the tank for the selected amount of wattage/size of aquarium/reflector efficiency etc.

That means that you can either reach the wanted wattage by using less but...
Forum: Lighting 12-14-2011, 07:40 AM
Replies: 20
Views: 4,514
Posted By defdac
Ok. I understand the confusion. It's the...

Ok. I understand the confusion.

It's the same as when comparing the miles per gallon between a BMW M3 and a Toyota Prius running the same (high) speed around a track. To keep the speed with the...
Forum: Lighting 12-13-2011, 10:58 AM
Replies: 20
Views: 4,514
Posted By defdac
Yes, exactly. But you don't need a PAR-meter for...

Yes, exactly. But you don't need a PAR-meter for that. If it is the PAR you want to maximize then just go with the maximum drive current.

This is not efficient though if you look at the problem...
Forum: Lighting 12-13-2011, 07:57 AM
Replies: 20
Views: 4,514
Posted By defdac
Yes I think that is in order. It depends how hard...

Yes I think that is in order. It depends how hard you drive the LED:s and their efficiency. If you drive the LEDs really hard to maximize the intensity from each LED you will get terrible efficiency.
Forum: Lighting 05-16-2011, 12:27 PM
Replies: 20
Views: 4,514
Posted By defdac
Some results. I have made a white hood with white...

Some results. I have made a white hood with white diffuse paint with 90% reflectance and a light probe counting photons and a Lux-value. The lamp is of the same dimensions as a HO T5 24 watt lamp...
Forum: Lighting 05-12-2011, 07:46 PM
Replies: 20
Views: 4,514
Posted By defdac
That is interesting and makes a point that no...

That is interesting and makes a point that no species will have one "definite" action spectrum. They can acclimatize to more "exotic blends" of light, perhaps with more yellow and green.

Does this...
Forum: Lighting 05-12-2011, 07:14 PM
Replies: 20
Views: 4,514
Posted By defdac
Yes. The old calculator you are testing out will...

Yes. The old calculator you are testing out will be phased out or mostly/only be used to add new bulb data.

The next calculator will render the result as seen in the three pictures above. This way...
Forum: Lighting 05-11-2011, 09:28 PM
Replies: 20
Views: 4,514
Posted By defdac
3D PAR/PUR-calculator

Hi folks, long time no see.

I'm making progress with my 3D light calculator. It will be a Java-based calculator that can be launched from a browser.

The current state is that the really complex...
Forum: The Lounge & Introductions 11-29-2010, 11:33 AM
Replies: 0
Views: 266
Posted By defdac
Help identifying an aquascape

The aquascape-picture used in this rendering looked interesting. Does anyone knows of the aquascaper or where the aquascape comes from?
http://farm6.static.flickr.com/5245/5215129311_0f89ecf511_o.jpg
Forum: Algae 06-07-2010, 02:08 PM
Replies: 37
Views: 2,851
Posted By defdac
This is a seriously important concept. ...

This is a seriously important concept.
http://en.wikipedia.org/wiki/Correlation_does_not_imply_causation


http://fishweb.ifas.ufl.edu/Faculty%20Pubs/CanfieldPubs/LimitFact.pdf
(I think he is...
Forum: Fertilizers and Water Parameters 03-29-2010, 01:15 PM
Replies: 11
Views: 1,079
Posted By defdac
Question Is that .5 ppm or 5 ppm?

Is that .5 ppm or 5 ppm?
Forum: Lighting 02-11-2010, 06:34 PM
Replies: 6
Views: 788
Posted By defdac
Yes, the more you know the more pragmatic you can...

Yes, the more you know the more pragmatic you can get when making a choice - with more probability of it being a good one.

I myself started by wanting to super-optimize the light only for growth...
Forum: Lighting 02-10-2010, 01:16 PM
Replies: 6
Views: 788
Posted By defdac
Instead of borrowing or purchasing..

http://www.defblog.se/LightCalculator/

I have upgraded the calculator to simulate an Apogee PAR-meter.

All the different measures you might want to know should be there except watt/litres.
...
Forum: Lighting 07-25-2009, 06:40 PM
Replies: 22
Views: 1,311
Posted By defdac
Glad you like the movies and the mounting legs....

Glad you like the movies and the mounting legs. It's DIY made out of chromed copper tubing for drinking water. Three tubes where I put a very long threaded rod inside the middle one and just screwed...
Forum: Lighting 07-25-2009, 03:44 PM
Replies: 22
Views: 1,311
Posted By defdac
Exclamation Dust algae and PAR

New video, now with dust algae and without. I also flip up one reflector while measuring:
http://www.youtube.com/watch?v=Xse1ZJV6MVc

Notice how much clean glass helps reflecting down light....
Forum: Lighting 07-22-2009, 06:09 PM
Replies: 19
Views: 5,455
Posted By defdac
The only plants I've had been trouble growing...

The only plants I've had been trouble growing because of light limitations is HC and P. helferi so to me the big question have always been what kind of intensity is on the substrate level.

I see...
Forum: Lighting 07-22-2009, 11:48 AM
Replies: 22
Views: 1,311
Posted By defdac
Then we share the same goal. =) +1 ...

Then we share the same goal. =)


+1


This is what I believe also. I was surprised that T5NO-bulbs often has higher PUR-effiency than the saeme T5HO, wasting less energy and getting more...
Forum: Lighting 07-22-2009, 11:37 AM
Replies: 19
Views: 5,455
Posted By defdac
Great, that is what I want to do. I'm fairly...

Great, that is what I want to do. I'm fairly uninterested in exactly how the light varies at surface level and more of an average intensity that you can use compare with others averages.

Getting...
Forum: Lighting 07-21-2009, 10:56 PM
Replies: 22
Views: 1,311
Posted By defdac
That will never ever be what the normal aquarists...

That will never ever be what the normal aquarists buy that can't afford a PAR-meter.


I'm very certain that this is completely false and not at all what the normal aquarists shoot for.

Agreed...
Forum: Lighting 07-21-2009, 06:51 PM
Replies: 22
Views: 1,311
Posted By defdac
I guess that is pretty much exactly what my...

I guess that is pretty much exactly what my seagull shaped Aquamedic reflectors do. All they need to do is getting down as much of the omni directional light down on the surface, then the glass+water...
Forum: Lighting 07-21-2009, 06:36 PM
Replies: 19
Views: 5,455
Posted By defdac
Agree with everything there Hoppy. Distance and...

Agree with everything there Hoppy. Distance and reflector efficiency is where you get most bang for the buck.

I'm seeking a simple mathematical model. Would it be ok to say that most hobbyists...
Forum: Lighting 07-21-2009, 09:41 AM
Replies: 22
Views: 1,311
Posted By defdac
You mean shallow narrow tanks? You mean...

You mean shallow narrow tanks?


You mean variation from straight under the bulb to the sides?
Forum: Lighting 07-21-2009, 09:35 AM
Replies: 19
Views: 5,455
Posted By defdac
Ok, so you will still get the inverse square law...

Ok, so you will still get the inverse square law only it will be offset or multiplied with some constant by the tank+water?
Showing results 1 to 25 of 123

 
Forum Jump

All times are GMT. The time now is 08:28 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012