Lifetime Prediction for a Cell-on-Board (COB) Light Source Based on the Adaptive Neuro-Fuzzy Inference System (ANFIS)

Table 4

LED chip lifetime of light output maintenance.

Lifetime maintenance	1500 mA/57.3 °C	1500 mA/87.5°C	1140 mA/87.4°C	1140 mA/105.5°C
	4118.932	2945.860	4222.648	4418.790
	8322.795	5952.463	8532.367	8928.695
	12,615.171	9022.367	12,932.822	13,533.553
	16,999.856	12,158.298	17,427.922	18,237.447
	21,480.923	15,363.154	22,021.820	23,044.732
	26,062.690	18,640.035	26,718.959	27,960.055
	30,749.799	21,992.257	31,524.090	32,988.384
	35,547.200	25,423.360	36,442.292	38,135.037
	40,460.214	28,937.143	41,479.016	43,405.717
	45,494.532	32,537.699	46,640.114	48,806.551
	50,656.343	36,229.418	51,931.890	54,344.129
	55,952.231	40,017.038	57,361.111	60,025.557
	61,389.370	43,905.687	62,935.171	65,858.507
	66,975.459	47,900.875	68,661.942	71,851.283
	72,718.941	52,008.574	74,550.044	78,012.892