The above post is designed to directly compare lamp types in terms of Lumen and Watts. Response to: http://www.plantedtank.net/forums/sh...ad.php?t=20939
This article does not address issues such as how much light you need for a given tank or what spectrum means. I recommend you visit:
Finally, this is a draft. Please post typos and I will attempt to fix. For example the table appears at the bottom and not under "summary table" where it should. Please do not post "corrected" bulb values of less than ~10% difference.