The led savings calculator works out regular bulb total cost, reg bulb lifetime sec and led bulb 100yr cost from daily usage, energy price, lifetime, price, power consumption, over how many years?, price, power consumption, one way and lifetime. Enter what you have and the relationship is applied straight away, so you get the answer without working through the algebra yourself.
What Is the LED Savings Calculator?
The led savings calculator turns daily usage, energy price, lifetime, price, power consumption, over how many years?, price, power consumption, one way and lifetime into regular bulb total cost, reg bulb lifetime sec and led bulb 100yr cost.
It is a quick way to get from the numbers you have to the number you need, without setting up a spreadsheet or reaching for a formula.
How the LED Savings Works
Each result follows from the ones before it, and the calculator shows every step, so a surprising answer can be traced back to the input that caused it.
Round your inputs to the precision you actually know, and keep more precision than that in the intermediate steps.
Getting a Result You Can Trust
Run the calculation twice with slightly different inputs. A sensible calculator moves its output in proportion; a wild change points to a unit or a decimal point problem in what you entered.
Write the inputs down next to the answer. It takes a moment and it is the difference between a number you can explain and one you cannot.
A Worked Example
Working through an example, with daily usage set to 10, energy price set to 5, lifetime set to 2, the calculator returns led bulb 1yr cost of 182,700.05, and led total cost of 913,200.25, and led bulb 100yr cost of 18,262,505.07292. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out regular bulb total cost?
Enter daily usage, energy price, lifetime, price, power consumption, over how many years?, price, power consumption, one way and lifetime. The calculator then works through the relationship and reports regular bulb total cost, reg bulb lifetime sec and led bulb 100yr cost.
What does the led savings actually calculate?
It takes daily usage, energy price, lifetime, price, power consumption, over how many years?, price, power consumption, one way and lifetime and converts them into regular bulb total cost, reg bulb lifetime sec and led bulb 100yr cost using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter daily usage?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Does anything you type get stored?
No. The whole calculation runs inside your browser, and nothing you enter is uploaded, logged or sent anywhere.
Do I have to fill in every field?
Only the fields a particular result depends on. If you leave one blank, the results that need it simply show a note instead of a number, and everything else still works.