F Fish are friends Fish Crazy Joined Aug 23, 2010 Messages 316 Reaction score 57 Location GB Aug 15, 2011 #1 i would like to know how to calculate the wpg for the light for my small tank.. the tank is 25 litres the light has an 11w bulb and measures 8 inches across!!
i would like to know how to calculate the wpg for the light for my small tank.. the tank is 25 litres the light has an 11w bulb and measures 8 inches across!!
QuantumOptician New Member Joined May 8, 2011 Messages 36 Reaction score 0 Aug 15, 2011 #2 1 L = .264 Gallons 25*.264 = 6.60 Gallons 11 W / 6.60 G = 1.67 W/G