Originally Posted by
Tigerbarb
http:///forum/post/2769064
So... for example, if my electric bill is at about $400 as it is,(random example, like I said) how much do you think the bill be if I run the 175w halide for 6 hrs a day?
To determine how much your bill will go up, all you need to do is find out what your electric company charges you per kilowatt. It should be on your utility bill. Then fill in the following equation:
((Total wattage x duration x 30 days) / 1000) x cost per kilowatt
Example1: 175w x 6hrs x 30 days = 31500 / 1000 = 31.5 kilowatts per month x $0.12 per kilowatt = $3.78 more per month
Example2: 65w x 10hrs x 30 days = 19500 / 1000 = 19.5 kilowatts per month x $0.12 per kilowatt = $2.34 more per month
So you can see that even if you live in an area with high electric costs (12 cents per kilowatt) it is only going to cost you less than $4 per month to run the halides. And, you are only going save $1.14 per month by using the PC retrofit. If your electric bill is already $400 per month, is $4 more dollars really going to be that much of a strain? I'd go with the halides or an upgraded T5 setup.