UKcyrus... please dont take this wrong... this is one of those cases of relativity... but that light IS small and doesnt penetrate that well.
i aint slamming on you... that light is 10x as big as my bulbs, but it isnt half of a 200 watt HPS.
and for the record, a 200 watt HPS is small too
you want to grow big tall plants you want at least 400 watts of HPS.
but hey, it is your grow do as you want... one of two things will happen... you will discover i gave you good advice or you will discover i am wrong... either way, you will know what works for you