As answered in this question, transparent bricks are made of PC (polycarbonate) and as listed in this answer and on Brickipedia there are fourteen transparent colors:
40 Transparent (clear) 41 Transparent Red 42 Transparent Light Blue 43 Transparent Blue 44 Transparent Yellow 47 Transparent Fluorescent Reddish-Orange (Transparent Dark Orange) 48 Transparent Green 49 Transparent Fluorescent Green (Transparent Neon Green) 111 Transparent Brown (Smoke) 113 Transparent Medium Reddish-Violet 126 Transparent Bright Bluish-Violet 143 Transparent Fluorescent Blue 182 Transparent Bright Orange 311 Transparent Bright Green
I am interested in the exact optical properties Transparency and translucency of this colors. How much percentage of light is absorbed? Has anyone measured with a prism which wavelength gets filtered out for each color?
P.S.: Why do I want to know? I want to put different kinds of LEDs in transparent bricks and like to know how the light is influenced. There are LEDs in different colours (light temperature) and one can calculate the luminosity at specific voltage and current. I'd like to calculate the luminosity as modified by the polycarbonate which the LEDs are put into.