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A short YouTube segment (Ben Greenfield) introducing photo modulation (light energy) and describing the Weber laser, a German therapeutic laser device. The speaker notes the Weber laser is from north of Frankfurt, Germany, is well-studied, and delivers multiple light frequencies—typically between about 500 and 1,000 nanometers—across colors including UV, blue, green, yellow, red, and infrared, used in what the speaker calls a "rainbow IV" session.
Questions this video answers
North of Frankfurt in Germany.
Typically between 500 and 1,000 nanometers.
UV, blue, green, yellow, red, and infrared (described as a "rainbow" session).










