Well, this is close enough

So c1scot, you posted a picture of your freaking light bulbs and the box says clearly "300W Replacement"...and then below 65W. Yes, you're right it uses 65W...BECAUSE IT IS A 65W BULB! The 300W b.s. is talking about how bright humans see it and is comparing lumen output between a CFL and a incandescent bulb.
CFL's have more lumens per watt then a standard incandescent thus they SEEM as bright as a higher powered incandescent bulb...
Anyway, let's just talk about lumens. What does it say on your box? Probably something like ~4200. Since you have 2 you've got about 8400 lumens. (I'll give you that since you've got them both directly overhead) How many plants are you growing? How many sq.ft. of space? 8400 lumens is probably enough for .3sq.ft. of growing space....
But forget it, don't listen to anyone on here because we don't know what the fuck we're talking about. Your plants will tell you loud and clear when you can see your hand through your plants' stretched out colas.