Table 2.

The effects of different mixed color light-emitting diode (LED) lights on the biochemical blood parameters of laying hens at 20 wk of age.

Parameter	Treatment group
	WL group	BG-YOL group	YOL group	BGL group
TP (g/L)	39.54 ± 0.86a,b	37.59 ± 0.84b	37.91 ± 1.11b	40.67 ± 0.84a
GLU (mmol/L)	15.82 ± 0.18a	15.53 ± 0.37a,b	15.71 ± 0.15a	14.92 ± 0.20b
TG (mmol/L)	13.49 ± 2.10b	11.76 ± 2.25b	13.09 ± 2.92b	20.54 ± 2.01a
Ca (mmol/L)	8.27 ± 0.73b	7.91 ± 0.74b	10.18 ± 0.87a	9.64 ± 0.43a,b
P (mmol/L)	4.33 ± 0.16a,b	4.32 ± 0.12a,b	4.06 ± 0.16b	4.56 ± 0.12a

^a,bDifferent lowercase letters within a row indicate significant differences (P < 0.05).

Data are presented as means ± SE.

Abbreviations: BG-YOL group, blue–green (435–565 nm) light at phase 1 (1 D–13 wk) followed by yellow–orange (565–630 nm) light at phase 2 (14–20 wk); BGL group, blue–green (435–565 nm) light at phase 1 (1 D–13 wk) and phase 2 (14–20 wk); Ca, calcium; GLU, glucose; P, phosphorus; TG, triglyceride; TP, total protein; WL group, white (400–700 nm) light at phase 1 (1 D–13 wk) and phase 2 (14–20 wk); YOL group, yellow–orange LED (565–630 nm) light at phase 1 (1 D–13 wk) and phase 2 (14–20 wk).