The Planted Tank Forum - View Single Post - Metal halide or T5 H.O?
View Single Post
post #15 of (permalink) Old 03-10-2012, 01:42 AM
Algae Grower
Join Date: Aug 2008
Location: Providence, RI
Posts: 70
Originally Posted by samamorgan View Post
Energy used converted to light:

Incandescent/Halogen: 10% light
Metal Halide: 25% light
Flourescent: 70% light

There are more factors, but this is the basic concept.

This is incorrect.

Originally Posted by samamorgan View Post
Yeah, most of the energy that is not converted into light is converted into heat instead, so for that metal halide, 75% of the energy used is converted into radiation. This leads to more expensive cooling bills as well. Yet another thing to factor

Imagine a 150w incandescent

All of the energy, whether or not it is converted to light, will end up as heat. Flourescents and halides watt for watt will put out the same heat.

120g SPS Coral Tank
90g Planted in process of setting up
James77 is offline  
For the best viewing experience please update your browser to Google Chrome