正确的室温测试方法：
The ambient temperature is to be measured by means of a thermocouple immersed in a bath of 15 milliliters of mineral oil in a glass container. The oil bath is to be placed:
a) At the same level as the horizontal plane formed by a line that passes through the portable luminaire halfway down its vertical length; and
b) At least three unit diameters from the product horizontally.
----------摘自UL153-12th Edition
