Aquarium light photoperiod energy calculator

Calculate daily lighting energy and daily electricity cost with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Choose the currency for these amounts. Changing it keeps your numbers and does not convert exchange rates.

Use daily lighting energy and daily electricity cost to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Lighting segments JSON [[hours,measured watts],...]
[[2,20],[6,60],[2,20]]
Electricity tariff (USD/kWh)
0.25
Daily lighting energy (kWh)
0.44
Daily electricity cost (USD)
$0.11

Try another scenario

Lighting segments JSON [[hours,measured watts],...]
[[3,20],[6,60],[2,20]]
Electricity tariff (USD/kWh)
0.25
Daily lighting energy (kWh)
0.46
Daily electricity cost (USD)
$0.12
Calculation method

Calculation method

Daily lighting energy (kWh)

Sum segment hours×measured watts /1000; total hours≤24.

Daily electricity cost (USD)

Sum segment hours×measured watts /1000; total hours≤24.

Symbols and units
a
Lighting segments JSON [[hours,measured watts],...]
b
Electricity tariff (USD/kWh)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Calculation uses the entered values and stated mathematical model; quantities must use the labelled units. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Sum segment hours×measured watts /1000; total hours≤24.
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