Cost of 400 hps and rvk

How much would it cost to run rvk 125mm A1 24/7 per week? An how much to run a 400 watt hps 12/12 an 18/6 per week? my unit price is 12p per kwh thanks

My bill has only gone up mabye 10 to 25 bucks a mo, some months even down from the days when I wasnt growing at all, and I'm running (3) 250W HPS, (one has a 250W MH in it now, during veg), and (1) 400W MH, which only runs during the "middle" 12 hours out of my 18 hour "on" cycle during veg, plus I have four 100W equiv CFL's on the outskirts of the inside of the 4' X 2' closet... But since my temp is well-maintained, with plenty of fresh, clean air being constantly exchanged and circulated, and I have my canopy as low to the floor as possible, with 5-gallon buckets sitting on top of a 2" drain pan, with a fountain pump for drain-off water going to a remotely located resoivoir near my remotely located ballasts, so, I'd say you may not even notice much of a difference at all, especially if you are easy on the thermostat and other loads at the location... Btw, Im a journeyman union electrician... So, electricity is what I know best... with cannabis cultivation running a very close second, in my life's diciplines..for what itz worth... A 400W H.I.D. ballast and lamp pulls 4 amperes during the on period... which isn't very much at all... Your kitchen pulls way more than that when you use your oven, or microwave, or toaster, and refrigerator, and what not... I wouldn't even give it a second thought, truth be known...