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Re: advice on light increase

Hello, I am thinking of increasing the light over my 38 gallon planted low 
tech tank.  It has 60 watts normal fluorescent and no CO2.  My question is, 
how much of an increase would 72 watts compact fluorescent be?  I know that 
compact fluorescents are supposed to put out more light than the same wattage 
normal fluorescent, but how much more?  I am willing to do DIY CO2, but I 
don't think I am ready for real high-tech.  Would it be a better idea to add 
an extra normal fluorescent tube?  What would be the best way to do that 
since I have a regular double bulb strip light?  Thanks in advance, Teresa.