Watts Per Gallon

[unspoken930]

Okay, i feel kinda stupid but if i have a 12 gallon tank with a 13 watt bulb (its a plant grow bulb) about how many WPG do i have.... i seriously cant figure this out so if you can explain how to convert... and yes, i looked on the pinned thread about lighting

 

[Ginge]

Okay, i feel kinda stupid but if i have a 12 gallon tank with a 13 watt bulb (its a plant grow bulb) about how many WPG do i have.... i seriously cant figure this out so if you can explain how to convert... and yes, i looked on the pinned thread about lighting

13/12=1.08wpg.