火 - Wiktionary, the free dictionary ※ Definitely, "火" here is a unit of brightness (luminous intensity) However, the brightness of a luminous device is measured in watts in life because of luminous intensity's dependence on power, which resulted in it being bonded to watt, the unit of power
火 - Dong Chinese dictionary 火 | fire | huǒ fire, flame, burn, anger, rage - Huǒ surname Huo - huǒ fire, urgent, ammunition, fiery or flaming, internal heat (Chinese medicine), hot (popular), classifier for military units (old), Kangxi radical 86 | Pictograph of fire