sunshine spectrum is many colors. if u bought a bulb for every color in the suns spectrum u couldn't fit them all in a huge room. but u can try as many colored bulbs as u can from the dark to the bright end of the spectrum and give them all to your plants. using 1 bulb or so is like naturally having the same car headlight aimed in your eyes everyday. people hate it, plants hate it too, give your plants colorchanges for the better. Make the strain better. U'l have flowers all over,around, and inside them.