你可以看12.6合格性判定方法那几条,要求比12.5要多
b) The values of the ambient temperature and the temperature measured at 1,1 times (the
rated voltage or the maximum of the rated voltage range) are plotted on a graph (Figure 9)
and the best straight line obtained using linear regression is drawn through these points.
The extrapolation of this straight line shall not reach a point representing a mounting
surface temperature of 180 °C at a ballast or transformer winding temperature of less than
350 °C.
它要求要绘一个曲线图的,如果一个灯,做12.5时,稳定后安装面的温度没有超过130度,但它在很短的时间内就升高了,这时用曲线图的话,可能就不合格了