Sweet, can't wait to see how you get along. So are you going to be using a blue 125w and a blue 200w for veg, and then replace the 125 with a red? If so sounds good, except it would be ideal to have the 200w red and the 125w blue, because you always want more red than blue during flowering. Oh and you must keep them compact with these lights, if you've got more space great, but don't just let them get all lanky. The secret to using these lights is keeping your plants compact so the light doesn't weaken as much when reaching the lower foliage, ppl don't have that prob with HID coz the light has so much penetrating power
. 40cm sounds good, if all goes well you should be getting at least 1/2 ounce per plant. And yes my bill is staying low after all it's just 125w, not much more than your average bulb in a room, I just turn lights of around the house, turn the T.V off stand by, only put enough water in kettle ect. and it tends to balance it out.