Calculate the electricity consumption of the chain of lights - it's that easy
You can easily calculate the electricity consumption and the cost of a chain of lights yourself. Energy-saving LEDs are particularly cheap, while conventional light bulbs quickly become expensive.
Fairy lights: calculate electricity consumption & costs
In order to calculate the electricity consumption of the light chain and the costs incurred, you need two values: How many watts does the light chain have (see package or note on the plug) and how long is it in operation? We recommend regulating the chain of lights with a timer.
- How to calculate power consumption: Watts x hours of operation
- How to calculate the electricity costs: 0.3 euros x electricity consumption
- (0.3 euros corresponds approximately to the price per kilowatt hour)
Electricity costs of the chain of lights: example
Traditional chain of lights with 30 watts for 6 hours on 31 days:
- Power consumption: 31 x 6 x 30 = 5, 580 watt hours (Wh) or 5.58 kilowatt hours (kWh)
- Electricity costs: 5.58 kWh x 0.3 euros = 1.67 euros electricity costs
Electricity costs for LED fairy lights
LED fairy lights use even less electricity. For example, this chain of lights with 400 LEDs only has 6 watts. How to calculate the cost for 31 days with 6 hours each:
- Power consumption: 31 x 6 x 6 = 1, 116 watt hours (Wh) or 1, 116 kilowatt hours (kWh)
- Electricity costs: 1.116 kWH x 0.3 = 33 cents electricity costs
Do you want to reduce your electricity costs? Here are the best electricity providers in comparison!
Which fairy lights are good for something? Stiftung Warentest has done the string light test and shows which ones are really good.