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XTi Science
Trial of XTi PAWS on Hy-line W36 layer hen production and growth
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November 20, 2018

Trial of XTi PAWS on Hy-line W36 layer hen production and growth, 3/2017 – 11/2018

Internal XTi Trial

Conclusion: Exposure of Hy-line W36 laying hens to XTi’s pulsed alternating wavelength system (PAWS) resulted in faster bird growth, improved egg production, and better egg-size distribution compared to the control and W36 breed standard.

Study Objective:

  • To evaluate the effect of XTi PAWS on production and growth of Hy-line W36 layer hens.


  • Previous pilot study on layer hens showed improved egg production and egg size distribution under 24hr lighting.
  • Pilot study showed hints of possible impact on bird growth under XTi lighting.


  • The study was conducted at XTi’s research facility in northern Colorado.
  • 216 Hy-line W36 layer hens were obtained from a local producer at 12 wks. The birds were placed into 9 tents of different XTi “recipes” and a control. Birds were placed under ramping light schedules or 24hr lighting.
  • Birds were started on “grow” light recipes and changed to “lay” light recipes at week 16.
  • Data was collected until birds were 87wks old. One tent was kept until week 100.
  • Birds were kept in commercial battery cages and fed standard 18% lay feed.


  • Birds under XTi grow recipes showed a 9.8% increase in weight over control birds at 21 wks.
  • XTi lit birds reached max egg production 2-3 weeks earlier than birds under control lighting.
  • XTi egg production was better than internal control and comparable to W36 breed standard.


  • XTi “grow” recipes showed promising results on early bird growth.
  • Early production shows possible financial impacts of early bird growth and maturity.
  • No negative health outcomes were noted for the birds.
  • Animal behavior under XTi lighting was improved: calmer, easier to handle birds.
  • Additional research is needed to further assess impacts on growth, production, and animal health.
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