Table 2. The CCT tunability values through precursor concentration control and post-synthetic dilution of lignite-derived CQDs.

Lignite amount (g)	First diluted CQDs concentration (µg mL−1)	CCT (K)	CRI	CIE coordinates	Second diluted CQDs concentration (µg mL−1)	CCT (K)	CRI	CIE coordinates
0.08	1360	4535	80	0.37, 0.42	680	7504	74	0.28, 0.36
0.05	850	5055	79	0.34, 0.41	425	8612	76	0.27, 0.34
0.03	510	6078	75	0.31, 0.39	255	11 258	74	0.25, 0.32