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输入功率与光能:
$$P_{in}= V_f \cdot I_f, \quad P_{opt}= \eta_{WPE}\cdot P_{in}$$发热量与热阻:
$$P_{heat}= P_{in}(1 - \eta_{WPE}), \quad T_j = T_a + P_{heat}\cdot (\theta_{j\text{-}s}+ \theta_{s\text{-}a})$$温度修正后光通量:
$$\Phi(T_j) = \Phi_0 \cdot \left[1 + \delta_\Phi \cdot (T_j - 25)\right]$$发光效率(光效):
$$\eta_{lm/W}= \frac{\Phi(T_j)}{P_{in}}$$