| 5, 20, 50, and 100 lx (LED) | Hy-Line W-80 (week 25—36) | No effect on egg production, egg weight, and eggshell qualityLight exposure time influenced cloacal and surface temperatures, feed intake, body weight, and albumen percentage in egg. | Bahuti et al. (2023) |
| 121.8, 57.4, and 11.9 lx (compact fluorescent) | Lohmann-Brown (week 20—40) | Higher intensity → earlier sexual maturity Higher intensity → lighter yolk color, ↑ egg production, ↓ egg size, ↑ feather condition | Erensoy et al. (2021) |
| 5 and 150 lx (fluoroscent) | Hy-line Brown (week 16—24) | 5 lx: ↓ activity, ↑ preening & dust-bathing 5 lx: ↓ egg production, delayed onset of full lay | O’connor et al. (2011) |
| 333, 118, 59, and 20 lx during early life | Laying hens (week 20—23) | Higher intensity during rearing → stronger nest preference Lower intensity → no clear nest preference | Zupan et al. 2007) |
| 4.7—44.5, 52.6—54.5, and 89.8-151.9 lx | ISA Brown (week 75—83) | Higher intensity → ↑ egg production Egg quality varied depending on light intensity | Yildiz et al. (2006) |