Hey everyone, currently i am only growing one plant under a 40 watt fluoroescent light bulb, leaned in the corner of my closet to give a little more reflection. I want to switch to my 400 watt HPS light but im just wondering how much it will bring up my energy bill approximately? would anyone know? also im wondering, do you think i can veg a plant with the 40 watt fluoro? or is it not strong enough to veg one plant? any opinions or suggestions would be greatly appreciated. thanks a head of time!