Quote Originally Posted by sam111
I WOULD NOT SAY THAT THE WATT OF THE LIGHT HAS ANYTHING TO DO WITH THE YEID 400 SOUNS JUST RIGHT MAYBE IF GROWTH SLOWS DOWN ADD MORE LIGHT BUT OTHERWISE I WOULDNT REFER TO WATTAGE TO YEILD
The wattage of the light has alot to do with it. You should do some more research before you make any more posts.