Anyone good with formulas?

[Curious]

I know it might not be that hard, maybe I am thinkning to hard, but does anyone have a formula to determine the cost of lamps per minute used. I want to know how much lamps cost me per minute or session used.

Any help would be greatly appreciated! Thanks.

[tanfixr]

Ok, let's see, if you want price per lamp in cents.

cpm = (ppl*100)/(hrs*60),

where

cpm = lamp replacement cost per minute
ppl = price per lamp
hrs = hours used

If you want to know the total bed lamp cost per minute, multiply the lamp cpm by the number of lamps in a bed.

[tanfixr]

BTW, if you want to calculate lamp cost per session, multiply the bed cost per minute by number of minutes of a session.

For example, a $10.00 lamp that lasts 700 hours in a 32 lamp bed will have a single lamp cost per minute of about 0.024 cents per minute per lamp, or .76 cents per minute for the whole bed. A 20 minute session will cost about 15 cents in lamp costs.

[wrecked]

Try this math....

32 x $10 = $320 per change
$320 / 700hrs = $0.46 per hour
$0.46 / 60min = $0.008 per min

or a 20min session costs $0.16

The bottom line is change your lamps.....they really do not cost that much!

[Curious]

Thanks for the help and don't worry we do change our lamps but don't you ever wonder these kind of things. We do.

[engfant]

and that's a good thing.