Category H10 sheet defines LED light source H10_LEDr dimensions, electrical and photometric characteristics, and measurement requirements. The LED light source shall not exceed the envelope indicated in Figure 2 and shall function in either voltage polarity. Essential characteristics include rated 12 volts, 21 watts, luminous flux 850 lm ± 15%, cap temperature maximum 100°C, and electrical current 1500 mA minimum at 12–14 V DC. The document specifies screen projection requirements using box systems, contrast requirements, and normalized luminous intensity distribution measurements in C-planes per CIE Publication 70-1987.