Stefan Heidrich

  • Posted on January 5, 2018 at 6:11 am

Would the entire light with 650 lumens on a surface of meet only 0, 5 m, so, a reflector of a lamp / a spotlight so you can already 1300 Lux-> stronger would have focuses the light, the greater number / illuminance is the Lux. In practice, the light is scattered but much more. That’s why is a Lux specification rather useless. If number is advertised with a high Lux views of the packaging should be particularly critical. The luminous intensity candela can be converted in the luminous flux lumen. For the calculation is still the angle of the lamp / the LED front out legislative. In addition, it is to observe that the light intensity is highest in the middle of the beam and descends towards the outside. In the example, would be equivalent to 190 candela about 20 to 40 lumen and were thus on the level of a 10 W bulb.

Better than the a LED light bulb wattage / an energy saving bulb of a halogen light with a certain light bulb wattage to referenziern is, that on the luminous flux (lm lumen) and the Farbtemeperatur will be respected. Light perceived as warm has a colour temperature of 1600 (candle light) up to about 3000 K (tungsten). Cold white light, an energy saving light bulb / fluorescent lamp has a colour temperature of about 4000 K. Daylight is in the range of 5000 to 7000K. (Typical values) Good standard LEDs offer a luminous flux of about 30 to 80 lumens per watt. This means that an LED must have 6 to 10 Watts for a light output of 650 lumen bulbs compared with a 60 W light bulb about. If you have any questions: we of the Lichthaus Mosch in Berlin can advise you!

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