Cost of lighting kWh
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Cost of lighting kWh

This is a discussion on Cost of lighting kWh within the Saltwater Aquarium Equipment forums, part of the Beginner Saltwater Aquariums category; --> How much would it cost to run a dual 150 watt fixture Metal halide with ballast. I am paying 9.7 cents kWh. Is it ...

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Old 04-10-2009, 12:32 PM   #1
 
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Cost of lighting kWh

How much would it cost to run a dual 150 watt fixture Metal halide with ballast. I am paying 9.7 cents kWh.

Is it a simple calculation or does the ballast actually reduce the amount of power pulled into the system some how?
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Old 04-10-2009, 09:08 PM   #2
 
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It's going to depend on the ballast you get. If you get a Magnetic ballast then you're going to be using less light for the wattage and i've heard that there's a 10% more power drainage. If you get electric ballasts then you can expect the # to be more exact. Also it'll depend on what line you're running it on.
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Old 04-11-2009, 12:08 AM   #3
 
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So it could potentially cost something like 50 bucks a month to run a dual MH fixture then eh?
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Old 04-11-2009, 12:38 AM   #4
 
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I don't think it's that high. IF you get a meter called the kil-o-watt, it'll measure it and then convert it to dollars per month, but it also can vary based on the hours you run them both but the ballast will have an affect on how much wattage is pulled. So me giving you the answer is kinda a moo point. You're better off asking the manufacture IMHO, but you can probably go with $50-75, but my math might be off. i'm getting tired
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Old 05-16-2009, 09:30 PM   #5
 
1 kwh is equal to a 100 watt bulb runnung for 10 hours.

so your dual 150 watt running for 10 hours will cost you
$0.29. multiply by 30 days it should cost you $8.70.

300x10 hours = 3 kwh x $0.097 = $0.29

Hope this is usefull
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Old 05-16-2009, 11:09 PM   #6
 
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Quote:
Originally Posted by burch76 View Post
1 kwh is equal to a 100 watt bulb runnung for 10 hours.

so your dual 150 watt running for 10 hours will cost you
$0.29. multiply by 30 days it should cost you $8.70.

300x10 hours = 3 kwh x $0.097 = $0.29

Hope this is usefull

Word, I second what burch said just multiply it out. Figure out how many hours a day you run the lights, multiply that by the number of days in a month (just approximate with 30), and multiply that by the wattage of your bulb(s), and that's your kWh. Multiply by price, and voila and pretty good estimate of price.

Kells makes a good point, the ballast, if inefficient, will end up burning a little more power than goes to your bulb. A 100W bulb will still consume 100W (I'm pretty sure), but an inefficient ballast might add some more Watts to that for your total power consumption. You could go with kells' suggestion and add 10% to your bulb wattage for a conservative estimate. Going with burch's example, assuming ballast inefficiency you're up to $9.60 a month. Still under 10 bucks, probably not going to break your bank if you own a saltwater tank lol.
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