Quick Guidance on Some Power Compacts...

[chabooky386]

So i have a 72 gallon bowfront tank. I have 1 Medium sized Flower Horn in there. I have the Coral Life 20K Pendant that i used for my saltwater tank before. I stopped using it when i switched my tank to fresh water cas it like ATE MY WATER up in like half of a day. I was wondering where can i see the color and brightness differences in the different wattage bulbs...? Help

 

[dskidmore]

There should be either a color temperature rating, or a little graph of the diffrent colors of light the bulb emits. The brightness measurement is lumens.