If you want a lower light tank, go with the T5. Better spread. WPG is a rule of thumb comparable to 1 inch of fish per gallon of water. Its a very vague idea only suited for the basic of fishkeeping. The same applies to wpg. Lumens are more important as the wattage really only applies to the amount of energy the bulb uses.
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For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow.
Member of the AGA (Aquatic Gardner's Association)
Member of the IBC (International Betta Congress)
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