Lighting in milk production

interesting Carlos!

Interesting discussion, and fresh air within the literature and Engormix.

Lighting plays a crucial role in dairy cow production!

Lighting Design is not so frequently discussed at the farm level nor at technical/scientific meetings, however, it's key!

Carlos, Alfredo—great discussion, and I agree this is an area that doesn’t get nearly enough attention at the farm or technical level.

One aspect that’s often overlooked in lighting conversations is the electrical quality of the lighting system itself. LED fixtures are non-linear loads, and depending on driver design, they can introduce electrical noise into the farm environment.

We were recently on a site where just three faulty LED drivers increased stray voltage levels by ~900 mV. That kind of electrical noise can directly impact animal behavior and physiology, potentially offsetting the benefits of long-day lighting programs.

So while lighting intensity, spectrum, and photoperiod are critical, it’s equally important that systems are electrically clean. Otherwise, you can unintentionally undermine the very gains you’re trying to achieve.

This is an area where lighting design and electrical engineering need to come together more closely.

Thank you, Carlos Alejandro, for your valuable input.

You raise an important point: lighting is often an underappreciated factor in dairy production, yet it has a direct impact on animal behavior, feed intake, and milk yield. Aligning lighting programs with the physiological needs of the animals can significantly enhance both productivity and welfare.

In today’s environment, where efficiency and sustainability are critical, precision lighting offers a compelling opportunity to improve performance without expanding herd size. When properly implemented, it optimizes biological responses, translating into measurable gains in productivity and consistency.

At HATO, we have seen how consistent light distribution, proper intensity, and photoperiod management support hormonal balance and improve overall herd performance. Well-designed lighting systems are increasingly becoming a key component of modern dairy operations.

It is encouraging to see more industry professionals recognizing the broader impact of lighting. This is undoubtedly an area with significant potential to shape the future of dairy farming.

Beyond production, the impact on animal welfare, stress reduction, and fertility is equally important, reinforcing that lighting should be considered a strategic management tool rather than a facility cost.

In a context where margins are tight and efficiency is critical, integrating precision lighting solutions represents a high-ROI opportunity for dairy producers looking to maximize output without increasing herd size.

Great to see more awareness being created around this topic—definitely an area with strong potential for the future of dairy farming.