Will I see a difference?

Hi.....
So my new 600watt hps and grolux bulb are getting installed tonight replacing my 400watt hps generic bulb.
My area is a 3'x3' space
I have usually 6-8 girls in at a time - pretty much doing what they want with a bit of bending and cutting here and there.
All other variables staying the same - Should I see a difference? If so, What? will they be denser? will there be more??

Thanks In Advance
OHR

Probably yes and yes. The more light the better. You will have to tell us how much of a difference you notice.

it will be quite a differance.

Good Morning
I Installed the new light last night. It worked out very well, I only changed the ballast and bulb. The cord and socket were the same as well as the reflector.
There was a definite difference in light. The new light a is a lot brighter (duh) as well as a lot bluer. .
We shall See....

100% positive that there's gona be diference

for good ofcourse

It will make the plants die you wasted your money. jk They will love it. Just keep an eye on temps they may go up some.

Huge difference - now 2 years later!! I troll to much....

your plants will experience a sharp increase in heat and u can lose yield if it stays too hot in your space. if you keep it cool enough, however, you will see more buds produced (obviously). for a 3 x 3 room with 600w, i recommend a 6 inch inline fan and a cooltube if u can. keeping the plants cool means u can keep em closer to the light and expect denser yields.