| LED: 650±10 nmFIR: 15±10 μm | Hy-line Brown (week 30—39 and 45—54) | LED + FIR → ↓ serum cholesterol, HDL-C, triglyceride LED + FIR → ↓ E. coli, Salmonella, total microbes in feces LED + FIR → No effect on laying performance or egg quality | Lim et al. (2023) |
| Red (630—750 nm), blue (450—490 nm), green (490—570 nm), and white LED | Hy-line Brown (week 47—53) | Red LED → ↑ egg-laying rate Green LED → ↓ egg number, ↑ egg weight Blue LED → ↑ eggshell strength All → No effect on feed intake or efficiency | Kim et al. (2018) |
| Blue LED (week 1—18) → Red LED (week 19—31) and normal LED | Hy-Line W-36 (week 1—31) | Blue LED → ↑ body weight during pullet phase Red LED → ↑ yolk %, ↓ albumen % during laying phase | Poudel et al. (2022) |
| White (400—760 nm) and green (560 nm) | Brown-Nic k layers (week 48—56) | White LED → No effect on egg production, egg quality Green LED → ↑ yolk pigmentation (a*, b*) Green LED → ↓ serum albumin | Yenilmez et al. (2021) |
| White (400—700 nm), blue-green (435—565 nm), yellow-orange (565—630 nm), continuous yellow-orange, and continuous blue-green LED | Jinghong layers (week 1—20) | Blue-green LED → ↑ immune function Yellow-orange LED → ↑ bone density Yellow-orange LED → ↑ reproductive development | Wei et al. (2020) |
| White, green, red, red-green LED | Lohmann LSL lite layers (week 33—50) | Red LED → ↑ egg production, ↑ feed efficiency Green LED → ↑ body weight White LED → ↑ egg mass | Raziq et al. (2020) |
| Red and white LED | White Leghorn (week 18—72) | Red LED → ↓ plasma corticosterone Red LED → ↓ H/L ratio, ↓ asymmetry scores White LED → No effect on production, egg weight | Archer (2019) |
| Red (660 nm), green (560 nm), blue (480 nm), and white LED | Local mountainous laying hens (week 19—63) | Red LED → ↑ egg shape index, ↑ fertility, ↑ hatchability Green LED → ↑ eggshell strength, ↑ pigmentation Green LED → ↓ total egg production Blue LED → No effect White LED → Maintained standard production and quality | Li et al. (2014) |