yes but look at the intensity, height, and coverage. I mean you can't go by WPG now with the intensity and efficiency of the newer lighting systems today and thats not even considering LEDs
Coming from my experience I bought a new 125 gallon tank and wanted to do 'high light' so I bought a fixture that fit the 3 - 5 WPG equation. 700 dollars later I had a fixture capable of pumping out 500 watts of power and I grew lots and lots of... ALGAE. My tank was so far out of balance that I was unable to produce a sustainable system. After doing a load of research, mostly provided by the sweat and hard work of hoppy, I now have a fixture that runs only 3 bulbs at 240 watts (I need the extra for coverage) and the light is still so intense that I have to screen the top of my tank.
Do NOT go by WPG if you don't want frustration and headaches... Listen to the people who have been there or put in the time and done the research.
And, at my measly 1.9 WPG, with the screens for substrate PAR reduction, I can grow ANY plant I want... Never had a plant bark at me for not having enough light. I promise you'll be fine.
Cheers,
Abe