Will my light enough? - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 07-11-2012, 12:23 PM Thread Starter
PTrader: (0/0%)
Join Date: Jul 2012
Location: Malaysia
Posts: 1
Smile Will my light enough?

Hi, this is my first post in this forum. I want to ask if my light enough for my aquarium.I have decided to plant a carpet of glossostigma some dwarf hairgrass and also some riccia. My lightning is a metal halide which is 70 watt.My tank is 2 feet tall,2 feet long and 1 feet wide.
IwagumiGuy99 is offline  
Sponsored Links
post #2 of 5 (permalink) Old 07-11-2012, 01:08 PM
Planted Tank Enthusiast
WestHaven's Avatar
PTrader: (0/0%)
Join Date: Jun 2012
Location: Northern Michigan
Posts: 915
2x2x1 = 4 cubic feet = about 30 gallons. 70 watts / 30 gallons = 2.33 watts/gallon. I think you'll be fine.
WestHaven is offline  
post #3 of 5 (permalink) Old 07-11-2012, 01:18 PM
Planted Tank Guru
PTrader: (18/100%)
Join Date: Jan 2011
Location: TN
Posts: 2,045
Isn't the watts per gallon rule only for T8 and T12 fixtures?

Snail Glades,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Rainer is offline  
post #4 of 5 (permalink) Old 07-11-2012, 01:18 PM
Planted Member
PTrader: (0/0%)
Join Date: Dec 2010
Location: Philippines
Posts: 181
The WPG rule is useless. Refer to the sticky in the lighting section or wait for the experts to chime in.

18 gallon low-tech planted community
specks is offline  
post #5 of 5 (permalink) Old 07-11-2012, 05:01 PM
Wannabe Guru
flight50's Avatar
PTrader: (5/100%)
Join Date: Apr 2012
Location: dfw
Posts: 1,402
I am no expert but I can pitch in a little. Hoppy is the man when it comes to this.The wpg rule is out dated now. At one point that is all we knew for a go by but technology has changed and there are so many different types and variables of lighting now. The wpg was based on everyone using the same lighting fixture for pretty much the same tank which back then were fluorescent tubes, then came compacts, metal halide, led, and cfl and so forth. A fixture can have the same wpg as another on a particular tank but the light itself would react differently given it has different properties. Thus the best way to measure light now is the PAR value.
flight50 is offline  


Quick Reply

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome