Cost of 600w HPS in AZ??

Was curious about the cost to run 18/6 600 w hps light in arizona havent got 1stt bill yet but afraid wifes gonna shut down shop when she sees it...., could u please give me an estimate, runing 2 fans and 1 exhaust fan with it???

Are you on a basic plan, a time of use plan? Is the ballast set up to run under 110V or 220 V? Under the SRP basic plan, with a 110v ballast, you will be paying around 36.28 dollars every 30 days at 18/6. You can throw all that math out the window if you are using a different plan or a 220v Ballast (half the price to run it under a 220V ballast)

The real killer here is , how much air are you exhausting out? If you are exhausting 200 - 400 CFM of air out of your house, in turn your central a/c will have to work extra to cool down that extra influx of air in your house. An 1800 Sq. Ft House will have all the air in the house replaced one or two times per hour depending on the size of your exhaust fan, leading to your central a/c cooling down the replaced air and working longer.

Damn i got 101 views and not 1 guess.....it says it is 50 cents an hour kwh, im runnin ac 80% of the day 2 degrees cooler then usual, the 600w hps 3 fans two normal and 1 outfan. it is 5 cents per kwh during off peak, right now june-august they have this bull shit 3-6 pm it is super peak fuck u aps and ur super peak. that is a big difference 5 c to 50, for all u az growers i got a website u should reall look at http://www.aps.com/main/services/residential/rates/rates_29.html#ta7 , i think u will be surprised i was. Also last night was my first night switching to 18/6, i did it from 10pm to 4am, i HAVE toswitch my lighting so its off from noon till 6 what is this gonna do to my plants. they have been on 24 til yesterday did 1 night of 18/6....please help

my house is 1900 sq ft but it is in an inclosed closet i have my ac vent in the bedroom t ducted to it and the bedroom end blocked off like i said the ac runs about 80% of the day have it set at 77

I can do the math for u all day long... But I really need this info :

Hours per day running light on peak, as well as off peak.

How many cfm is your exhaust fan.?

What was your ac bill last summer without any lights running?

Bill last year between june threw july was 290-440 it topped tryin to find cfm for fan had a old grow buddy install his shit so not to sure i will get back to u hope this can help u give me an estimate, also they have been on 24hrs for the last 10 days, now 18-6 hope this info helps and thank u

Because your plants are vegging...strict lighting schedule isn't necessary like it is for the flowering phase. So switching them to the times that are best for you won't be that difficult. I have my veg lights on at 7 p.m. and off at 1 p.m. My flower lights start at 7 p.m. and are off by 7 a.m.

fan is a 440

Ok... these are rough estimates:

No matter what running 18/6 you will have to run AT LEAST 2 hours at high peak rates, which calculates to $7.56 a month a usage during your peak hours. During non peak hours you are going to be spending $19.15 for a grand total of $26.71 per month based on an ideal light schedule that only includes 2 hours of on-time from 1-8.

Because you are sucking air out of your house at 440 CFM (wherever it goes it needs to be replaced somehow it is sucked in through cracks in your house), you will need to cool this new warm air down. This is where your real cost is going to be because at 440 CFM, and assuming an average ceiling height of 9 ft... All the air in your house will be replaced every 30 minutes the fan is running, thus leaving your A/C running overtime.

I live in a house almost the same size as yours, and when not running any A/C or heat, I get bills of around 60 dollars. So subtract that from your bill as the base cost of all your household appliances running each month (minus the A/C). So, your A/C probably cost you around 360 or so to run last summer without your grow room, and may possibly need to work 50 % harder than it did last year depending on the heat of our summer this year. You could easily go up into the mid 600 dollar bill range due to this if we have a heat wave like we did last summer.

The real cost isn't from your light, it's from sucking out all the air out of your house and making your central a/c work overtime. Everytime your central a/c fires up, your gonna be using A LOT more than that light ever cost you.

As to your question about time of use plan, it is definitely better if you can stick to a flower room that is on during night, as you can see you saved roughly 15% on your light cost alone by having your plan on time of use as compared to basic.

i think you should make three more new posts asking the same question. i dont think the first three were enough.

arizonarookie said:

Was curious about the cost to run 18/6 600 w hps light in arizona havent got 1stt bill yet but afraid wifes gonna shut down shop when she sees it...., could u please give me an estimate, runing 2 fans and 1 exhaust fan with it???

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The electric cost of the lighting are pretty marginal. What really increases the cost of your electric bill is the fact that you are pumping the air conditioned air out of your house at 450 CFM. Even without the huge amount of exhaust, your air conditioner undoubtedly dominates your electric bill. My setup adds about $60-70 to my electric bill. Helps a lot that my 12/12 is 7M to 7:AM.