Quote:
Originally Posted by retro1983
This morning went to lfs. The shop assistance say K value not so impt for planted tank, then wattage is more impt. Thru his experience.
Haiz, also dunnoe true anot.
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For plants growth, Par and Lumens are the ones that you should look out for. WPG is a very very rough guide for gauging lighting for plants.
Check out these articles:
Lumens/PAR/PPFD/Watt per Gallon Topic
Light and Plants
Towards a Plant Growth Lumen
A Comparison Between Light Sources Used in Planted Aquaria