Well it�s right, that the red light has less energy than the blue. This is the reason why the red GTS is faster. Explanation: The sunlight is white. When the sunlight hits the GTS, the red one reflected the red light (thats why you see it red). The blue light will be absorbed of the red GTS. So the high energy light is still in the red ones. You see, the red has more energy inside.
Helmuth
