Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > General Hardware/Equipment Discussion
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 05-28-2008, 01:17 PM   #1
Aquarium Advice Apprentice
 
Join Date: May 2008
Location: Anglesey, North Wales
Posts: 15
Question MH Bulbs - Retrofit installation

Hi all,

I'm really struggling with my Watts/Litre. My tank is a 270L Bow fronted, which means that the rectangle section at the back is 120cm x 26cm, and then the front bows out 19 cm more. I can't buy an off the shelf lighting system.

If I install regular T5 tubes I can only get 3 x 34" tubes, producing a total of 117 Watts, which is about 0.5 Watt/Litre.

Therefore I have looked at mounting two 150W Metal Halides in the rear section, and a single T5 or possibly another 150W MH in the front section which would give 2 Watt/Litre. My questions are:

(1) What's the spread on the light, ie the footprint of the beam?
(2) How hot do 150W's get?
(3) How much gap above and below the lights do I need?

I may well resort to building a new lid for the tank, but before I do I'd be interested in the answers.

My tank will be Fish & reef, with soft coral/polyps to begin, but I might move onto hard corals later.

Any advice greatly appreciated,

Thanks

Steve
__________________

__________________
Taking my first tentative steps towards a reef - with all the help from AA
steve149c is offline   Reply With Quote
Old 05-28-2008, 01:45 PM   #2
AA Team Emeritus
 
cmor1701d's Avatar


 
Join Date: Feb 2003
Location: Belle Mead, NJ
Posts: 7,814
I believe that a MH bulb sitting 6" -12" (15cm - 30 cm) above the water line should have about a 2' x 2' (60cm x 60cm) beam to the bottom of the tank.

I would think that you could get a 4 or 6 bulb fixture to go over the rectangualr part of the tank, but I have not researched that.
__________________

cmor1701d is offline   Reply With Quote
Old 05-28-2008, 04:32 PM   #3
AA Team Emeritus
 
Ziggy953's Avatar



POTM Champion
Tank of the Month Award
 
Join Date: Feb 2006
Location: Owings Mills, Maryland
Posts: 9,101
I have dual 175w MH 2x110w VHOs and 2x54w T5s over the same tank. The rectangle part of the tank is equal to that of a standard 55g tank.
Ziggy953 is offline   Reply With Quote
Old 05-28-2008, 05:36 PM   #4
Aquarium Advice Apprentice
 
Join Date: May 2008
Location: Anglesey, North Wales
Posts: 15
Thanks for all that,

I think I am going to probably a 6 or 7 T5 system over the tank, mixture of lights for specific temp colours etc. Then I have some good control for the photoperiod of sunrise and set, plus lamps for a moon lamp.

So that should be 6x39Watt day lights, and 1x39Watt night light, giving me 234 Watts at day, or just shy of my 1 watt per litre aim (270L tank).

Thanks again,

Piccies on the way as I progress,

Steve
__________________
Taking my first tentative steps towards a reef - with all the help from AA
steve149c is offline   Reply With Quote
Old 08-01-2008, 03:39 AM   #5
AA Team Emeritus
 
Ziggy953's Avatar



POTM Champion
Tank of the Month Award
 
Join Date: Feb 2006
Location: Owings Mills, Maryland
Posts: 9,101
Quote:
Originally Posted by steve149c View Post
Thanks for all that,

I think I am going to probably a 6 or 7 T5 system over the tank, mixture of lights for specific temp colours etc. Then I have some good control for the photoperiod of sunrise and set, plus lamps for a moon lamp.

So that should be 6x39Watt day lights, and 1x39Watt night light, giving me 234 Watts at day, or just shy of my 1 watt per litre aim (270L tank).

Thanks again,

Piccies on the way as I progress,

Steve
Just curious, why go with the 39w (36" bulb?) rather then the 54w 48" bulb? I used the 48" bulbs (54watts) on my 72 and could easily have gotten 4-6 over it. Just curious as to your choice there.
Ziggy953 is offline   Reply With Quote
Reply

Tags
bulb, bulbs, retrofit, stall

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
T8 Light Installation Satsumas Freshwater & Brackish - Planted Tanks 3 08-10-2008 03:29 PM
RO/DI Installation Help - So Close Vanphyre Saltwater Reef Aquaria 3 03-21-2006 11:18 PM
ro/di installation vsnsofadrgn General Hardware/Equipment Discussion 6 02-20-2006 02:23 PM
RO/DI installation? mrcrazypants05 General Hardware/Equipment Discussion 3 01-08-2006 11:51 PM
what bulbs should i get for my 4x96w retrofit? Jonathan G. General Hardware/Equipment Discussion 2 03-15-2005 03:14 PM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 11:22 PM.


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