Anyone having 30-40 watt on 55g planted? - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 34 Old 02-08-2010, 07:25 PM
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We use single tube 40 w and twin tube 40w on our 55 gal and 75 gal tanks

172 planted tanks

Procambarus Clarkii Orange
Assassin Snails
Leopard Nerites
Olive Nerites
Tiger Nerites
Zebra Nerites
Rabbit Snails
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post #22 of 34 Old 02-08-2010, 07:57 PM
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Single tubes now. I give up on lighting. It makes my head hurt. I should just go T5 ho and co2 injection. Why not? Then lighting isn't a factor anymore. Right? Not to the nth degree anyhow.

Wanna see what different lights look like on a tank? Unca harri has ya covered. Valotesti

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post #23 of 34 Old 02-08-2010, 08:14 PM
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Sounds like I'll be safe with the 2x20w on my 55g then. Thanks!
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post #24 of 34 Old 02-08-2010, 08:15 PM Thread Starter
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Alright for those of you that are details freaks like me here's what I found out:

(Info only for GE Florescent EcoLux Bulbs!!!)

Name: GE Sunshine VS. GE Daylight
Size: 48" T8 / 48" T8
Energy Used: 32 watts / 32 watts
Light Output: 2800 lumens / 2700 lumens
Color Temp: 5000 Kelvin / 6700 Kelvin
CRI: 86 / 78

Alright I'm gonna lean myself wayyy out of th window here now; someone help me if that trail of thought is correct or not....

Lux as we know is the measurement of the intensity in which Light is perceived by the human eye. So important for a planted tank will be the Full daylight outdoors which is 10-25.000 LUX (Full daylight not direct sun); The direct sunlight is 32-130.000 LUX

We know Lux is expressing the lumens per square meter; so if I had a 1 sq meter surface hit by a light that's 1.000 lumens that will equal the intensity of 1.000 Lux.

Now to keep my prop already screwy ideas simple I'm gonna do it measuring my tank in centimeters...

So my tank's surface (Standard 55g) is 32CM by 122CM = 0.3904 sq meters

LUX=Lumens / m2
2800lumes / 0.3904 sq meters =7172 LUX (using 1 GE Sunshine)
5600lumes / 0.3904 sq meters = 14.344 LUX (using 2 GE Sunshine)

Sooo IF I done all this thinking and calculating correctly (which I *think* I may have but am not sure) then in simple terms that would mean: Me using 1 GE Sunshine over my 55g will work for all my plants (Sword, Chain-sword, Crypt, Vallis, Ludwigia, Sagittaria) - In theory it should work anyway

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post #25 of 34 Old 02-08-2010, 08:22 PM Thread Starter
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Alright here the before-after shot of the tank now having 1 bulb not 2....Its hard to tell on the picture and surprisingly enough its really not as much of a difference as you'd think it is....while its not dim now with only 1 bulb is 'softer' I guess would be the way to explain it.
Specially that river gravel mix I have in there REALLY stuck out - negatively IMO- before and not its more natural looking IMO.

I used the camera w/out flash and tried to give it the same angle both times and you can tell the difference spc if you look at the floating plants.

As for looks I like it - Let's see what the plants say now - If they turn yellow tomorrow I know what's wrong
Attached Images
File Type: jpg 55gLight change.jpg (106.3 KB, 29 views)

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post #26 of 34 Old 02-08-2010, 08:30 PM
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I like it a lot with one. It looks great. Hopefully your plants agree
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post #27 of 34 Old 02-09-2010, 07:58 AM
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The tough part about comparing pictures is the camera will try to compensate for lower light by keeping the aperture open longer. But I agree that to the human eye, removing one bulb doesn't appear to make that much difference. But the plants will let you know what they think.
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post #28 of 34 Old 02-09-2010, 02:30 PM
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Natalie, how are you looking today with your 1x30w? I'm still torn on the 2x15w or 2x20w.
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post #29 of 34 Old 02-09-2010, 02:34 PM Thread Starter
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Quote:
Originally Posted by WisFish View Post
The tough part about comparing pictures is the camera will try to compensate for lower light by keeping the aperture open longer. But I agree that to the human eye, removing one bulb doesn't appear to make that much difference. But the plants will let you know what they think.
I know and I even tried different settings for you guys to get a better picture but really it doesn't work - You'll just have to take my word for it that it looks nice and "smooth"

Quote:
Originally Posted by LisaC144 View Post
Natalie, how are you looking today with your 1x30w? I'm still torn on the 2x15w or 2x20w.
I'm still liking it; later if I have time I may switch between the GE Sunlight and GE Daylight see what visual diff that makes.

~ Life Is Too Short, Break The Rules, Forgive Quickly, Kiss Slowly, Love Truly, Laugh Uncontrollably And Never Regret Anything that Made You Smile.
Life May Not Be The Party We Hoped For, But While We're Here, We Should Dance. ~
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post #30 of 34 Old 02-09-2010, 02:50 PM
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Great, keep me posted. I don't need to buy my lights for another week when I can order my gravel (waiting on the stump ornament to get back in stock).
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