you need a ballast to spark the bulb to light so you will need a hps ballast. theres loads knocking about cheap enough now. as for the flowering boost, just give them some atami bloombastic in the last 2 weeks of flower, it will coat all the buds in sticky resin. deadly stuff and really did the job for me. a lot of people use it all the way through flower but normal nutes through flower then this for a boost at the end. it contains calcium and magnesium as well as iron and other micro nutrients
good luck with rest of grow.
lu
also on another note, i was getting yellowing of the older fan leaves and necrosis on the leaves which i put down to a magnesium/calcium def. so i added lime to one of my plants on this grow, one teaspoon to a 15l pot and no yellowing at all. i did a side by side on two plants so if anyones intersted i can show pics. defo worth adding lime and it keeps the ph at seven aswell.