LED 18W驱动功率偏差
如题，标签上注明的是18W，实测19.2W。出往北美，是否合格？北美市场针对功率偏差的标准是什么？谢谢！
1993上有这个：
With the ballast energized at the input voltage and frequency in accordance with Clauses 8.1.5,
8.1.6, and 8.1.8, the input current shall not be more than 110 percent of the marked rating, and, if
additionally marked for wattage, the input wattage shall not be more than 110 percent of the marked rating
plus 0.5 W with the device in the base up position controlling:
a) A lamp or lamps which the device lampholder can accommodate, and
b) No lamp in the case of a lamp adapter.
驱动可以看看驱动对应标准
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