Bulb LED 4,9W (470lm) E27
Useful information about bulbs
When buying a new LED bulb, there are some important things to be aware of.
The brightness of an LED bulb is measured in what is called lumen instead of watt.
15W = 140 lumens
25W = 250 lumens
40W = 470 lumens
60W = 800 lumens
75W = 1050 lumens
100W = 1520 lumens
In addition, a RA- or CRI-value is also stated on the bulb. It describes the light's ability to reproduce colors and is assessed on a scale of 0-100 CRI, where 100 CRI corresponds to daylight.
For an average home, it is recommended to use a bulb with a CRI value of min. 80CRI.
The Kelvin rating, on the other hand, describes how warm the light from the bulb is.
8,500 - 10,000 K = Cool blue
7,000 - 8,500 K = Cool white/blue
4,500 - 7,000 K = Cool white
3,000 - 4,500 K = Neutral white
1,000 - 3,000 K = Warm white
In comparison, the light from a candle has a chelvin level of approximately 1,500 K, direct sunlight is 5,500 K, while the blue sky reaches 10,000 K.
If you want to know more about light bulbs, you can find more information here.