Lighting an Aquarium with PAR instead of Watts - Page 15 - The Planted Tank Forum
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post #211 of 445 (permalink) Old 06-20-2013, 03:02 PM
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Someone needs to sticky this thread again.

And thanks Hoppy for all your work, I find myself constantly referencing this thread in my own work and sending other people here.
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post #212 of 445 (permalink) Old 06-21-2013, 01:40 AM Thread Starter
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Originally Posted by majorwoo View Post
Someone needs to sticky this thread again.

And thanks Hoppy for all your work, I find myself constantly referencing this thread in my own work and sending other people here.
TPT doesn't use "stickies" now. Instead we use a FAQ section, as the first post in each forum. This is one of the FAQ threads listed there at: Lighting articles and FAQ

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post #213 of 445 (permalink) Old 07-04-2013, 03:03 AM
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cfl bulbs

Hoppy,
Do you remember the brand for the HD cfl bulbs you did the par test on? If I have a glass top on my tank does that change the par value? Thanks for this great write up.
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post #214 of 445 (permalink) Old 07-04-2013, 06:53 PM Thread Starter
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Quote:
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Hoppy,
Do you remember the brand for the HD cfl bulbs you did the par test on? If I have a glass top on my tank does that change the par value? Thanks for this great write up.
No, I don't remember the brand of those bulbs. While we were doing PAR tests on CFL bulbs, we noticed that our data were not consistent. A lot depended on how long the bulb was - how much of it stuck out of the reflector. And, it depended on the diameter of that reflector. Since then I haven't gone back to that subject to try to get more usable data. It would help if someone did that - very carefully.

The top glass on a tank seems to reduce the PAR by around 10-15%, not very significant, considering that our PAR data is rarely better than +/- 10% accurate.

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post #215 of 445 (permalink) Old 07-05-2013, 06:41 PM
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I can't seem to find any information in this thread regarding the Aqueon LED systems. Did I miss it, or does anyone know what kind of output they have?

I currently have 3 20" led strips with 9 LEDs each from Aqueon on my 20 gallon tank. Two are white and one is their "colormax" with alternating white and red LEDs. I have no clue how broad their spectra are or how much of the light they put out is actually useful for my plants. Does anyone know?
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post #216 of 445 (permalink) Old 07-07-2013, 11:08 PM
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Great read , are you going to do VHO bulbs?

Oops T12 's are VHO.


Jeff

Last edited by Sgtreef; 07-07-2013 at 11:41 PM. Reason: adding a line
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post #217 of 445 (permalink) Old 08-02-2013, 03:43 PM
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Hi Hoppy,
Awesome work here! I picked up a 30" ZooMed AquaSun T5HO fixture with dual 24" bulbs. I am using these grow bulbs I found on the cheap http://www.thelashop.com/4x-24w-3000...ent-tubes.html .

I think it may be overkill directly over my 20 Long but wanted to see if you had any info on the PAR values this fixture puts out at different heights. Any help is appreciated, Thanks!

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post #218 of 445 (permalink) Old 08-02-2013, 03:59 PM
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I have PAR data for the Home Depot PAR38 5000K 18w bulbs if anyone is interested. Ecosmart brand.
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post #219 of 445 (permalink) Old 08-03-2013, 02:27 AM
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Sweet let's see it!
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post #220 of 445 (permalink) Old 08-04-2013, 11:46 PM
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Quote:
Originally Posted by mmantelli View Post
sweet let's see it!
+1.

Mr. Aqua 30cm cube journal
20L high tech journal
Fluval EDGE slightly modded, low tech
3+ gallon (40 x 16 x 20.5 cm) aquatic soil, low-tech
Fluval spec V (sitting in a box)
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post #221 of 445 (permalink) Old 08-05-2013, 01:39 AM
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I am doing a 180g. My first planted tank.

I would like the "shimmer" of LED's but dont have alot of money to spend on lights.

Does anyone know the PAR ratings of the beamsworks LED fixtures? I could place one of those in 72", then do a HD shop light for the bright part of the day?

If I just did the HD shop light how many would I need over a 6 ft tank? I cant go higher than like 6" off the surface though.

I could also build an LED light, or try to, but my budget is like $250.
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post #222 of 445 (permalink) Old 08-05-2013, 03:05 AM
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Ecosmart PAR38 18W 5000K



I would say 30" from sub would be the sweet spot for a medium-high light cube. I got this bulb for $10 at HD. Perfect cheap bulb for those 7.5g cubes.
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post #223 of 445 (permalink) Old 08-05-2013, 11:53 AM
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Nice is there any way to get par data for a G.E. 26w 6400k 1610 lumen daylight CFL bulb over say a basic 10g.

Last edited by MMantelli; 08-05-2013 at 11:54 AM. Reason: forgot to add tank size.
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post #224 of 445 (permalink) Old 09-04-2013, 03:15 PM
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I'm considering getting two of the
FLUVAL LED nano FLUVAL LED nano
lights for a 12 gallon long aquarium. Do you guys think that I would need to use CO2 to keep down algae levels with this setup or would I be okay just using shrimp to keep algae under control?
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post #225 of 445 (permalink) Old 09-11-2013, 11:53 PM
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Waaaait!! so Hoppy if i place a Home Depot 2 bulb Diamond Plate Shop Light on top of my 60 gallon ( 24in from the gravel) I am going to have Medium light???
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