Table 3.

Performance parameters of four white LEDs under the current of 20 mA.

White LED	Weight ratio of constituents (%)			Ra	CCT (K)	η (lm/W)	CIE coordinates
	blue	yellow	red				x	y
(c)	98.36	0.66	0.98	90.8	3094	16.51	0.4354	0.4125
(d)	98.52	0.49	0.99	91.2	4818	15.05	0.353	0.3774
(e)	98.93	0.25	0.82	90.0	8990	17.01	0.2783	0.3163
(f)	98.46	0.56	0.98	91.6	4393	36.77	0.3582	0.3343