LED light bulb, 470lm/40W Crown E14, from Attralux.
If you're struggling with light bulbs and technical data, here's a brief explanation of the most important things you need to be aware of.
Today, brightness is measured in lumens instead of watts. You can roughly go by the following.
15W = 140 lumens
25W = 250 lumens
40W = 470 lumens
60W = 800 lumens
75W = 1050 lumens
100W = 1520 lumens
In addition, you can also see on a light bulb that there is an RA or CRI value. This is the light's ability to reproduce colours and is rated on a scale from 0-100 RA.
100 RA gives the best colour rendering and that's what you get from daylight.
For a typical home, you should choose light bulbs with an RA value of more than 80.
There will also be a kelvin degree labelled. This is the colour of the light. A light bulb with a kelvin rating of 2,700 - 3,000 has a warm light.
4.000-4,5000 gives a neutral to cool light and is the most optimal light colour to work in.
If you need extra energy during the dark months, go for a kelvin rating of 6,000 or higher.
If you want to read more about light bulbs, you can find more information here.