No, HPS is what you want for flower growth if you have to choose, you can also get Hortilux/Son of Agro bulbs that include blue light. That will help your flowering via more veg growth during the flowering period. Other factors will be how much light, how powerful it is (more lumens == denser bud), how good your conditions are and your skill as a gardener.
And of course, the size of your plant when you're through vegging it. The bigger and stronger, the bigger the buds.