Planet Earth
International Astronomical Union WGSN

Test of the Lamp

After obtaining a suitable lamp, I measured it in its four color modes: Red LED only, Blue LED only, Green LED only, and all together (white) respectively.

Test of the lamp: spherical LED lamp.

As expected, the sum of the individual luminosities of the colors should give the luminous intensity of white. This is not quite the case in the curve shown here.

The handheld photometer is used to measure the different colors. We see that this measuring device is also least sensitive in the red.

This correlation was not confirmed for the photometer with data logger, because this device (which is intended for measuring UV radiation from screens) is almost blind in the red and detects only blue and green (or their share in the respective mixed color).