| Conventional LED lamps and linear LED strips | Hy-line Brown (week 19—48) | LED strips → ↑ egg production after peak lay (28—48 wk).No effect on egg quality and thermal environment in cages | de SG Barros et al. (2020) |
| Incandescent, fluoroscent, and compact fluoroscent | White Leghorn (week 40—48) | Compact fluorescent & incandescent → ↑ egg production Incandescent → ↑ feed efficiency | Ahmad et al. (2010) |
| LED and fluorescent | Dekalb White (week 27—70) | No effect on egg weight, hen-day egg production, feed intake, and mortality rates.LED → ↓ eggs/hen housed, ↓ feed efficiency.Inferior feather uniformity and insulation at 36 weeks | Long et al. (2016a) |
| Dekalb White (week 27—60) | Greater avoidance distance at 36 weeks, but no difference at 60 weeksLED → ↑ egg weight & albumen quality (27 wk), ↑ shell thickness (40 wk), ↓ egg weight (60 wk).No effect on yolk cholesterol, lipids, FA composition, or shelf-life | Long et al. (2016b) |
| W-36 pullets (week 0—14) | LED → ↑ activity levels.No effect on body weight, uniformity, mortality, feather and comb conditions | Liu et al. (2018b) |
| W-36 laying hens (week 17—41) | LED → ↓ eggshell thickness & strength (41 wk); ↓ yolk cholesterol.No effect on egg production, feed intake, and feed efficiency | Liu et al. (2018a) |
| Incandescent, fluorescent, and white LED | ATAK-S layers (week 0—52) | LED → No effect on growth, intake, efficiency, livability, production, or shell quality; ↑ shape index & albumen index | Kamanli et al. (2015) |
| Lohmann LSL-Lite (week 14—69) | Red-spectrum LED → ↑ ovarian activity, ↑ feed efficiency; no effect on egg production | Baxter and Bédécarrats (2019) |