TESLAbikář or how to choose the right LED bulb
4. part luminous flux or luminous intensity of LED bulbs
For conventional bulbs, the luminous intensity was given by their wattage (W). Today, with modern LED technology, however, we cannot track how much an LED bulb will shine by its wattage (W). Because different light sources have different luminous intensities at the same wattage.
What is LUMEN?
How much a bulb should shine, i.e. how much light it should produce, is monitored by the luminous flux, which is given in units of lumen (lm). It shows us how much light energy the source emits in one second. The higher the value in lumens, the higher the luminous intensity.
If we want to choose more accurately, we can also find information on the recommended lighting intensity values for individual rooms in the house. This value is then given in units of lux (lx). Using a simple formula, we can calculate more accurately how strong a bulb we should buy.
For example, a value of 300-500 lm is recommended for a desk lamp on a workbench, whereas for a
200 lm is enough. For the main ceiling luminaire we are looking at around 800 lm.
If we have a 15 m2 bedroom and we know that we have a recommended intensity of 100 lx for the bedroom, then we get a value of 1500 lm. This means that we have to buy enough luminaires or sources to get 1500 lm in the bedroom.
Finally, it should be mentioned that each of us perceives light quite individually. These values are only recommendations and may or may not suit some people. However, before buying, we need to think about what we want to illuminate and for what purpose we will need the light.
The next part will be devoted to the color temperature of LED bulbs, which are in the range of TESLA lighting.
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