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Old 02-20-2011, 10:58 AM   #1
that Fish Guy
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Comparing Watts to Lumens


I want to get an LED Light for my 10 Gallon Aquarium.

Problem is they do not measure LED in Watts like they do for T5HO or Metal Halide so I am unsure how powerful they are.

How do you comapare Watts to Lumens.

http://www.fosterandsmithaquatics.co...m?pcatid=22443

This Marineland LED system is 1305 Lumens (What does that mean in terms of Watts).

Would that work out for my 10 Gallon Reef Tank (It is only 10 Inches deep with the sand). I am most worried about the Plate Coral on the very bottom of the Tank.

Since the Tank is so shallow could I get away with one of their cheaper models (I am not sure how LED will work out as I have not used them before so I do not know if I will like it or not and do not want to spend alot of money for something that I am trying out).

Marineland Single Bright $42.49 300 Lumens
Marineland Double Bright $79.99 450 Lumens
Marineland Reef Capable $179.99 1305 Lumens

Has anyone tried the Marineland LED systems before? If so what did you think of them?

Thanks in advance
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Old 02-20-2011, 11:18 AM   #2
ckusnierek
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I may be a lil off here but I do not think you can compare watts to lumens.

Watts is a measure if energy (used)
Lumens if a measure of light output.

Take 2 popular modes of lighting:
Halide
Florescent (VHO/PC/T5ho it reallt does not matter)

You can have 250w halides and 250w of any florescent The lumens generated for any of them will be significantly different.

The lumens produced from a 12 month old halide bulb (any wattage and temp) will be about 1/3 less than a new bulb. While still consuming the same wattage.

I'm really not sure why they are even rating LED lighting system in Lumens.
For all intent and purpose 1 Lumen=1 candle.

We all know for reefs it's all about kelvin/spectrum and PAR.

I would have 1,000,000 lumens of regular house light bulbs over my tank and all I would grow is algae.

Untill somone does a simi "scientific" study on LEDs over aquariums using a Quantum Meeter (to measure PAR) We will never really know how they compare with the rest.

This I do know. The Marine land fixtures are using standard 3mm 1w LEDs.
Most current LED lighting technology used 3w CREE LEDs.

I have not tried them but my LFS has a bunch of them.... Over softies tanks.

Personally I see a LED explosion comming in the next 12-18 months where extreme high output led fixtures will hot the market also causing a significant drop in price.
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Old 02-20-2011, 11:56 AM   #3
jdev167
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I have the marineland reef capable led lighting system its actually the one size larger than the one you are looking at but it has 1370 lumens I have a goniapora, frogspawn, bubble, mushroom and leather and they are all doing great and are at least 10 inches deep or deeper in my tank it also has a very cool shimmering effect you aren't going to get with a t5 or pc so i would say you should be fine I love my light I actually switch from a t5ho to this and like it a lot more then i did with the t5 it made my coral even look brighter anyway just my opinion but you should be fine on that tank with the marineland reef don't get the single or double bight cause they won't work
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Old 02-20-2011, 01:09 PM   #4
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Quote:
Originally Posted by ckusnierek View Post

I would have 1,000,000 lumens of regular house light bulbs over my tank and all I would grow is algae.
Chris has got it dead on (as I understand it anyway). I will say there is one caveat.... I saw a guy who ran his whole tank with CFL bulbs. Granted it was yellow and he had much lower energy effeciency than if he had set it up with proper bulbs..... but he did run it with screw ins.... kinda
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Old 02-20-2011, 01:33 PM   #5
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the marineland LED lights are relatively unproven (I think they've only been on the market a few months), but LEDs are becoming a very real option for reef lighting.

The only real way to quantitatively measure a tank's lighting output is by trying multiple options over the same tank application and take data with a PAR meter. Neither watts nor lumens are useful in describing how well coral will do in your specific setup.
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Old 02-20-2011, 01:38 PM   #6
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Quote:
Originally Posted by jdev167 View Post
I have the marineland reef capable led lighting system its actually the one size larger than the one you are looking at but it has 1370 lumens I have a goniapora, frogspawn, bubble, mushroom and leather and they are all doing great and are at least 10 inches deep or deeper in my tank it also has a very cool shimmering effect you aren't going to get with a t5 or pc so i would say you should be fine I love my light I actually switch from a t5ho to this and like it a lot more then i did with the t5 it made my coral even look brighter anyway just my opinion but you should be fine on that tank with the marineland reef don't get the single or double bight cause they won't work
Awesome. Thanks for all the replies guys.

That covers most of the corals I have.

Will it be good for Acropora though?
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Old 02-20-2011, 05:15 PM   #7
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with the Acropora if you are only 10 inches deep I would say you should have no problem with it but i would just start out with one and see how it does and if it does good go with it
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