Is it worth changing the Lightbulb?
Switching for a more efficient lightbulb for economic reasons
Electricity is pretty expensive in Germany. We pay around 0.30 EUR/kWh. A normal two person household uses around 2500 kWh/year which makes 750 EUR per year for electricity. This means it’s worth to think about reducing the cost.
After reading this article you will know how to get the perfect light bulbs for your home — and you’ll be able to calculate if it’s economically reasonable to replace perfectly working light bulbs with more efficient ones.
Properties of a light bulb
When you want to replace a light bulb, you need to make sure that the new light bulb fits in the socket. There are some very common socket types:
- E27: Edison Screw with 27mm diameter. This is the most common one for ceiling lamps.
- E14: Edison Screw with 14mm diameter. Light bulbs with this socket typically have a candle-shape.
- GU10 and G5.3: Typically used for spot lights in the kitchen
There are a lot of other sockets, but those three should cover most typical lamps.
Next, you need to think about which brightness you need. It’s measured in lumen and I distinguish those categories: