Manufacturer
Philips
Concept
If you're struggling with light bulbs, here's a short explanation of the most important things you need to be aware of.
Today, brightness is measured in lumen instead of watt. 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 a RA or CRI value is indicated. 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 an ordinary home, you should choose light bulbs with an RA value of more than 80.
There will also be a angle degree. 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 level of 6,000 or above.
If you want to read more about light bulbs, you can find more information here.