Lighting Help CFL and HPS

Im considering getting a 400watt HPS duel spectrum bulb for veg and flower with my next grow and was wondering if i was to buy 4 of these bulbs and place them in each corner of the room would it make any difference? (Would it be worth the effort and extra cost.)

The link to the site is here: http://www.bltdirect.com/product.php?pid=5359&cat=287&nm=Fluorescent+T8+Daystar+70+watt

Thanks.

Anyone???????????????????