Lighting an Aquarium with PAR instead of Watts - Page 13 - The Planted Tank Forum

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post #181 of 445 (permalink) Old 05-14-2013, 11:11 PM
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Hoppy- Great article!

Marineland provides extensive PAR data for their Aquatic Plant Lights. For example, as printed on the box, their 24" version provides up to 172 PAR at a 12" depth and 83 PAR at a 24" depth. Is this one of the higher PAR producing LED strip lights on the market?
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post #182 of 445 (permalink) Old 05-20-2013, 10:27 PM
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Re: Lighting an Aquarium with PAR instead of Watts

Because I can't seem to follow all the technical talk, maybe the boss can do it for me lol. So I've got a 29 gallon and the 17 watt T8 24" Aqueon bulb sits 17" from the surface. What would the par rating be around for this?

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post #183 of 445 (permalink) Old 05-21-2013, 04:34 AM Thread Starter
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Originally Posted by TB3Redneck View Post
Because I can't seem to follow all the technical talk, maybe the boss can do it for me lol. So I've got a 29 gallon and the 17 watt T8 24" Aqueon bulb sits 17" from the surface. What would the par rating be around for this?

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Probably around 30 PAR units, or good low light.

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post #184 of 445 (permalink) Old 05-21-2013, 05:37 AM
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Hey Hoppy, got questions for you.

1.If a light source has enough PAR but very little red/blue spectrum, can you still achieve deep red/purple colouring of plants?

2.I'm not sure which spectrum is needed to get those colours so substitute x value. Basically, if you have enough PAR will you get the colours regardless of spectrum?

3.Could one use a full spectrum bulb to cover all the requirements or does it have to be HIGH RED to achieve x colour , HIGH BLUE to achieve x colour.

Thanks.



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post #185 of 445 (permalink) Old 05-21-2013, 04:58 PM Thread Starter
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Quote:
Originally Posted by FlyingHellFish View Post
Hey Hoppy, got questions for you.

1.If a light source has enough PAR but very little red/blue spectrum, can you still achieve deep red/purple colouring of plants?

2.I'm not sure which spectrum is needed to get those colours so substitute x value. Basically, if you have enough PAR will you get the colours regardless of spectrum?

3.Could one use a full spectrum bulb to cover all the requirements or does it have to be HIGH RED to achieve x colour , HIGH BLUE to achieve x colour.

Thanks.
I don't know the answer. I'm not even sure that anyone has done the necessary testing to answer the question. From what I read it seems that getting good red colors in plants is a lot easier if you use higher light intensity than is absolutely necessary to grow the plants. But, whether that can be done by just adding more red and/or blue to the spectrum seems not to have been determined yet.

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post #186 of 445 (permalink) Old 05-22-2013, 09:42 AM
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Re: Lighting an Aquarium with PAR instead of Watts

Quote:
Originally Posted by Hoppy View Post
Probably around 30 PAR units, or good low light.
Ok that sounds alright. My tank is also heavy with tannin, so I believe that would also lower the par reaching the substrate? I'm thinking of converting my fixture into a two bulb screw in CFL fixture? What would that put the par around?
Thanks again!

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post #187 of 445 (permalink) Old 05-24-2013, 01:54 AM
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Hi Hoppy.
Heard you were the guy to ask about Lights. I just bought a 24inch Fluval "plant LED" light for my 10 gallon. without the brackets there is almost no overhang. but I was worried about PAR. do you know if this light is ok for a 10 gallon? I am very new and don't even have water or substrate in the tank yet cause I wanted to get everything right the first time.

Feel free to PM me. Thank you in advance!

reason I ask if its an ok light is because it was $159 and if there is something better for that price or lower I would love to know what it is.
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post #188 of 445 (permalink) Old 05-24-2013, 08:00 AM
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This thread helped me a lot in deciding which light to get for my 20l. Just saying thanks!
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post #189 of 445 (permalink) Old 05-24-2013, 08:17 AM
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Hey Hoppy or anyone else,

How would the Zoomed Aquasun rate among the T5HO units? I know they don't have the best reflectors, not sure about their ballasts. Any PAR data out there for these units?
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post #190 of 445 (permalink) Old 05-25-2013, 01:29 PM
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I just read your comments, and I was wondering I'd you've contacted catalina to inquire about shipping as I've been interested in their products for awhile but haven't followed up as I don't have the money yet
I have four of their fixtures. I really suggest you call. I find his fixtures very competitive in price, its a good product. Make sure you get splash guard :-)

Regards,
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post #191 of 445 (permalink) Old 05-28-2013, 03:49 PM
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Hey Hoppy would a SB and a DB from Marineland be enought to light my tank for low light plants? I have chance to trade for a 36"-48" single and double bright and was wondering if they would produce enough par for my tank as it is 75gal and they will be about 21" from substrate.
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post #192 of 445 (permalink) Old 05-29-2013, 02:58 AM Thread Starter
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The double bright light will give good low light on that tank, but may not cover the whole tank, because of its 18 inch front to back depth. The single bright will add very little more light.

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post #193 of 445 (permalink) Old 05-30-2013, 03:55 AM
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I found this on ebay will it be better than the marineland DB leds or not. I'm trying to figure out cause got a guy wanting to trade for guitar on Marinelands and have money for fixture on [Ebay Link Removed]

48" - 52" Freshwater Bright LED by Beamworks
Dimensions - 47.75” x 5.00” x 1.00”
Brackets add 0.65" in height
Includes 174 LEDs
900 Lumen
Super energy efficient .06 watt LEDs
162x 10000K LEDs
12x Actinic 460nm LEDs
Uses 11 watts
Slim and contemporary light design
2 mode on / off function for day and night use
Extendable bracket - 48"-52" max extend
Splash guard
110V - 220V
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post #194 of 445 (permalink) Old 05-30-2013, 04:35 AM
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Quote:
Originally Posted by KrystyonWayne24 View Post
I found this on ebay will it be better than the marineland DB leds or not. I'm trying to figure out cause got a guy wanting to trade for guitar on Marinelands and have money for fixture on [Ebay Link Removed]

48" - 52" Freshwater Bright LED by Beamworks
Dimensions - 47.75” x 5.00” x 1.00”
Brackets add 0.65" in height
Includes 174 LEDs
900 Lumen
Super energy efficient .06 watt LEDs
162x 10000K LEDs
12x Actinic 460nm LEDs
Uses 11 watts
Slim and contemporary light design
2 mode on / off function for day and night use
Extendable bracket - 48"-52" max extend
Splash guard
110V - 220V

those 12x Actinic 460nm LEDs are useless to plants i think
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post #195 of 445 (permalink) Old 06-05-2013, 03:19 AM
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What a great job Hoppy! I joined the forum just to say thank you. I was so inspired reading through the posts that I ran out to get two brooder lamps and 13 watt 6500k CFLs for my 20H. The difference between the stock t-8 light and the cfls is visible to the naked eye. Thanks!
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