M'akoy
are you keeping a fish only tank? Or a reef tank (with corals etc)?
If it is fish only, I guess 36 total Watts could be ok. But if you plan on keeping any corals, anemones, or clams, you will need to upgrade your light output.
I have heard that you need about 5 to 8 Watts of lighting per gallon of water.
Is not an issue of the quality of your lights, is more of the intensity of it. Corals for the most part need the sunlight in order to grow and live. And they need conditions similar to those where they are native to, meaning tropical areas.
To make this short, look into upgrading your lighting system to between 150Watts total, or 250 Total.
I have 54Watts in my tanks and it is a 12gallon
I am sure other guys will give you more advice. But best of luck in the meantime.