Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater & Reef - Getting Started
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 08-11-2004, 10:21 AM   #1
Aquarium Advice Apprentice
 
Join Date: Aug 2004
Location: New Orleans, LA
Posts: 12
Send a message via Yahoo to dufreneh
What's the truth about Power Compacts?

I'm about to start setting up a 90 gal tank. After starting it as a FOWLR tank, I will eventually make it a reef tank. I was reading "The Simple Guide to Marine Aquariums" last night which kind of confused me. From the book:

"A 55-Watt PC actually provides more light intensity than a 110-Watt VHO. Needless to say, when using power compacts, the 3 to 5 Watt-per-gallon rule does not apply."

According to this, I can have less wattage and more light with power compacts. A 4x96w fixture for my 90 gal is almost double the price of a 4x65w. If this is true, I could save a lot of $$$, but I figured I would ask a trusted source such as AA first.
__________________

__________________
dufreneh is offline   Reply With Quote
Old 08-11-2004, 11:13 AM   #2
member
 
Join Date: Oct 2003
Location: WI
Posts: 1,783
The first thing is you need to decide the corals you want to keep. This will help alot in light selection. PC'S are nice but they are not for every situation or coral. I like them for softies and most LPS corals but not for SPS or clams.


Do not go by watts per gallon as a way to determine proper lighting over a reef. The light source dictates the intensity not the water volume!
__________________

__________________
captivereefs is offline   Reply With Quote
Old 08-11-2004, 03:42 PM   #3
Aquarium Advice Addict
 
Join Date: Dec 2003
Location: Nebraska, USA
Posts: 6,703
Listen to captive reefs on this one.

The main reason though, is that wattage is NOT a measure of intensity...it's a measure of electricity USED to produce the light. Lumens is more useful measurement of light output.
Different light bulbs have different watts to lumens ratios. Incandescents suck, metal halides are better, then flourescents, then VHO, then PC.
metal halides are still nice though because they just put out soo much light in a tighter area, and allow you to supplement with actinics to add even more intensity.

hope that shed some light on why wattage isn't a great way to measure things.
__________________
Former advisor and planted tank geek...life's moved on though.
malkore is offline   Reply With Quote
Old 08-11-2004, 03:49 PM   #4
Aquarium Advice Apprentice
 
Join Date: Aug 2004
Location: New Orleans, LA
Posts: 12
Send a message via Yahoo to dufreneh
Thanks for the help. I think I'll go with the PC 4x65 type of fixture. At least for the first year or so, I'll be keeping fish, live rock and inverts. I will be building my own canopy so if I decide to get SPS, I'll add some MH bulbs later. No problem because I'll be taking my time with this anyway.
__________________
dufreneh is offline   Reply With Quote
Old 08-11-2004, 05:35 PM   #5
Aquarium Advice FINatic
 
boardsurfer's Avatar
 
Join Date: Aug 2003
Location: Charleston, SC
Posts: 823
Down with LSU! :P
__________________
- Mike
125 gal. reef w sump/refugium & 8-bulb 640w T5's
45 gal fresh w/plants + CPF lighting
boardsurfer is offline   Reply With Quote
Old 08-11-2004, 08:08 PM   #6
AA Team Emeritus
 
Join Date: May 2002
Location: Virginia
Posts: 2,256
Send a message via ICQ to fishfreek Send a message via AIM to fishfreek Send a message via MSN to fishfreek Send a message via Yahoo to fishfreek
Also note while some belive a 55W puts out more light than a 110W the 55W will only light a 2' long portion of the tank where a 110W will light a 4' portion.

I have 4 X 110W VHO over my 75 and I can tell you I would NOT get as much light output if I had 4 55W PC's. How do I know. Because I used to have a pair of 55W PC's over a 20gal tank. So I have some reference. I also have 4 X 96W PC over an 80gal tank and the corals grow faster in the 75 than the 80 even though if a 55W PC puts out more light than a 110W VHO you would think a 96W PC would then most definatly put out more light than a 110W VHO.

I belive the real measure of light output is lux.
__________________
Remember dont tap the glass, your fish will think you're an idiot -Anonymous mother

Check out our articles area. 30+ Aquatic articles for your enjoyment
Are you in or around the Shenandoah Valley area? If so click here to join our regional forum.
fishfreek is offline   Reply With Quote
Old 08-12-2004, 09:46 AM   #7
Aquarium Advice Apprentice
 
Join Date: Aug 2004
Location: New Orleans, LA
Posts: 12
Send a message via Yahoo to dufreneh
Thanks fishfreek. I'll keep that in mind.

Seems like boardsurfer is confused with a Gergia avatar and a location of South Carolina.
__________________

__________________
dufreneh is offline   Reply With Quote
Reply

Tags
power compact

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Power compacts vs T 5 jft Freshwater & Brackish - Planted Tanks 6 11-29-2009 06:29 PM
take apart power compacts?? supermarvin76 DIY Projects 2 05-15-2005 09:38 PM
power compacts mastershake Saltwater Reef Aquaria 5 12-16-2004 02:13 PM
Power Compacts for a 12 gallon? nam2212 Saltwater Reef Aquaria 5 11-08-2004 01:56 PM
Need fan for power compacts?? Joshsmit56001 Saltwater Reef Aquaria 7 11-26-2003 09:52 AM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 09:34 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.