Which type of light bulb should you choose?
Lamps can either have "built-in light", which means that you cannot or should not worry about the light bulb in the lamp itself. Other lamps have a socket that fits a specific light bulb type, for example E27, which is the most widespread light bulb type for indoor lighting (apart from spotlights). If you can choose the light bulb yourself, there are a few things you should be aware of:
Purely visually, pay attention to whether the light bulb is visible or not (can you see the light bulb?). Also think about whether the light bulb has a diffuser or not - can you "see into the light bulb?" then it has no diffuser, if the light bulb is milky white - then you have a light bulb with a built-in diffuser. A bulb with a diffuser is good for some things, not so beneficial in a lamp with a visible light bulb. No rule without exceptions - if, for example, the screen is lightproof and shines downwards (downward light) over the kitchen table, then a light bulb with a diffuser can be beneficial - the light therefore blinds less than a light bulb without a diffuser.
A light bulb is available as an LED, incandescent, halogen or energy-saving light bulb. Each type with its own characteristics. However, the light bulb is about to expire due to its high energy consumption. The LED light bulb, on the other hand, is energy-saving and does not have the same challenges as the energy-saving light bulb. The energy saving light bulb takes time before it is switched on at full power, whereas the LED light bulb switches on at full power immediately.
Have you ever looked at a light bulb and wondered what Lumen means? Lumen indicates how much light the light bulb emits - the luminous flux. A light bulb with high lumen lights up a lot and a light bulb with low lumen lights up less. Lumen indicates in principle the same as Watts.
What about the light bulb's Ra value? This value indicates the light bulb's ability to color reproduce a given object. The Ra value indicates the light's ability to reproduce light on a scale from 0-100. The higher the Ra value, the better the color rendering - for comparison, daylight has a color rendering of 100. So, if you want to be able to see the cucumber's green color on the kitchen table, choose a light bulb with a Ra value of at least 95.
Finally, Kelvin – what is it? Kelvin indicates the "temperature" of the light. So, it is not the light bulb that increases in temperature, but rather the color of the light. If you want a light bulb with a "warm" pleasant light, then choose a light bulb with low Kelvin, if you want a "cold" light, then choose a light bulb with high Kelvin. A typical light bulb above the dining table has a Kelvin of 2700K and daylight is around 6500K.
