leds vs flourecents
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 > Specific Aspects of a Planted Tank > Lighting


Reply
 
Thread Tools Display Modes
Old 04-23-2012, 11:58 PM   #1
new2aqua
Algae Grower
 
PTrader: (0/0%)
Join Date: Apr 2012
Location: Australia
Posts: 30
Default

leds vs flourecents


Hi, I'm new to this and although I know leds are better at consuming less energy as well as some other points but I was wondering if 54w leds would be better suited for a 4x1.5x1.5 ft than t5 45w flourecents and why? I will post more info on them if needed but if its a simple question and it can be answered with info given I would apreciate a responce.

Last edited by new2aqua; 04-24-2012 at 03:22 AM..
new2aqua is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-24-2012, 01:37 AM   #2
prototyp3
Wannabe Guru
 
prototyp3's Avatar
 
PTrader: (86/100%)
Join Date: Dec 2007
Location: Austin, TX
Posts: 1,221
Default

Quote:
Originally Posted by new2aqua View Post
I know leds are better
__________________
prototyp3 is offline   Reply With Quote
Old 04-24-2012, 03:11 AM   #3
new2aqua
Algae Grower
 
PTrader: (0/0%)
Join Date: Apr 2012
Location: Australia
Posts: 30
Default

Lol, what I mean is in terms of depth penetration and overall for an aquarium my size and if it would deliver same or more overall ammount of lighting and be well suited for aqua scaping. Leds could be better in many ways but that ammount of watts may not be well suited for my aquarium. I dont know, this is why i am asking for help and opinions on this matter. I don't know much on led's.
new2aqua is offline   Reply With Quote
Old 04-24-2012, 03:49 AM   #4
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,734
Default

The total watts the lights use is irrelevant to the question of how much light you have from either type of lighting. What counts is the PAR the lights provide, and for standardization, the PAR at the substrate level is the best thing to know. You could spread out 54 watts of LEDs uniformly over the top of the tank, and get a lot less maximum PAR than you would get if all 54 were in one row across the middle of the tank, or a lot less than if they were placed as close together as possible over the center of the tank. And, if you use optics, 40 degree optics for example, you could get a lot more maximum PAR than if you don't.
__________________
Hoppy
Hoppy is offline   Reply With Quote
Old 04-24-2012, 05:27 AM   #5
new2aqua
Algae Grower
 
PTrader: (0/0%)
Join Date: Apr 2012
Location: Australia
Posts: 30
Default

Some of the info of the light i was thinking of are as followes:

54W diy aquarium led
led Wavelength/color temperature:54pcs/1W Plants blue light
8pcs Blue:450-460nm ,White46pcs:6500-15000K
Size ( long wide high ):1500*125*23mm
luminous energy(LM):4200Lm
Input voltage(V): AC 85-265V 10%
frequency(HZ): 50-60
Shine angle(℃): 605
LEDOut light efficiency(%):93%
Working environment temperature(℃): -20~40
Attached Thumbnails
Click image for larger version

Name:	54W.png
Views:	12
Size:	180.8 KB
ID:	46210  

new2aqua is offline   Reply With Quote
Old 04-24-2012, 05:29 AM   #6
new2aqua
Algae Grower
 
PTrader: (0/0%)
Join Date: Apr 2012
Location: Australia
Posts: 30
Default

I relised that its 1w per light totaling in 54w. So iam not aware weather this is good or bad or suitable for me.
new2aqua is offline   Reply With Quote
Old 04-24-2012, 06:10 AM   #7
samamorgan
Wannabe Guru
 
samamorgan's Avatar
 
PTrader: (3/100%)
Join Date: Dec 2011
Location: Seattle, WA
Posts: 1,234
Send a message via MSN to samamorgan Send a message via Skype™ to samamorgan
Default

54 watts of LED will consume more energy than 45 watts of flourescent. 54 1 watt LEDs however will put out WAY more light than 45 watts of flourescent.

I honestly think you're asking questions that aren't easily answerable here, and should do some more research before you forumlate more questions/plans. One bit of info i can give you though: 99% of the time if it's cheap, you don't want it.
__________________
LED Lighting Compendium
20 Long Rimess w/LEDs
Quote:
Originally Posted by Ludwig van Beethoven
Don't only practice your art, but force your way into it's secrets, for it and knowledge can raise men to the divine.
samamorgan is offline   Reply With Quote
Old 04-24-2012, 06:12 AM   #8
new2aqua
Algae Grower
 
PTrader: (0/0%)
Join Date: Apr 2012
Location: Australia
Posts: 30
Default

so is it enough for 4x1.5x1.5?
new2aqua is offline   Reply With Quote
Old 04-24-2012, 06:18 AM   #9
new2aqua
Algae Grower
 
PTrader: (0/0%)
Join Date: Apr 2012
Location: Australia
Posts: 30
Default

Is that enough to penetrate the water enough to be able to give sufficient light to foreground plants? surely to a person who knows a litttle about this its a simple yes or no answer.

Last edited by new2aqua; 04-24-2012 at 11:20 AM..
new2aqua is offline   Reply With Quote
Old 04-24-2012, 03:50 PM   #10
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,734
Default

The issue isn't whether it will "penetrate the water". Any light will penetrate the water, because water is basically transparent over the distances we are concerned with. Water actually increases the light intensity by slightly focusing the light. The issue is how much total PAR you get from that arrangement of LEDs. Using my calculator for LED arrays, I think you would get about 20 micromols of PAR at a distance of about 16 inches, which is about how far this will be from the substrate. A single 54 watt T5HO bulb with a good reflector, would give you about 100 micromols of PAR at that distance.

The problem is the low efficiency of the 1 watt LEDs, only about 77 lumens per watt. Using Cree XM-L LEDs would be far more efficient and effective at lighting that tank.
__________________
Hoppy
Hoppy is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:59 AM.


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