Description of the LED panel fabricated with 2800 LEDs of five types. The basic arrangement of 25 LEDs comprised LEDs of five types (A). The LED types are presented with peak wavelength (nm) shown in numerals. Repeating the basic pattern produces a 40 cm × 10 cm LED module with 400 LEDs (B). Seven LED modules make up the LED panel (C). Mirror image light spots are visible along the margin of the LED panel area in the photograph (C) as a result of light reflection on the glossy plates surrounding the panel (see Figure 2).