Best LED Farm Yard & Barn Lights (2026 Guide)

Which Farm Light Do You Need?

How Bright Should a Farm Yard Light Be?

The easiest way to size a new yard light is to start from the one you're replacing. LED makers rate their fixtures against the old metal halide (MH) and high-pressure sodium (HPS) lights they replace. Here's how RAB rates its Yardblaster line, with estimated savings for a light that runs dusk to dawn:

*4,380 hours/year (about 12 hours a night) at $0.13/kWh, so your savings will depend on your local electric rate. Maker ratings assume the LED's downward-aimed light puts more of its output on the ground. Our linked conversion pages size by matching lumens one-for-one, which is more conservative.

Mounting height and spacing

• More poles beat more watts. One very bright light on a single pole makes glare and deep shadows behind equipment. For big yards, two or three 60W-class lights on separate poles light the ground more evenly than one 120W fixture.
• Higher mounting spreads the light wider but dims it at ground level. Most yard lights go on a pole or gable at roughly 15–25 ft.
• Use the maker's layout tool for bigger sites. RAB's free EZLayout tool and the fixture's IES photometric file show how bright the light will be on the ground before you buy.

The old mercury vapor farm light

Many farms still have a 175W mercury vapor yard light, often rented from the local electric co-op. Mercury vapor ballasts for general lighting haven't been allowed to be made or imported since January 1, 2008 (10 CFR 431.286), so when one fails, replacing the whole fixture is the practical fix. A 50–65W LED dusk-to-dawn light is the usual replacement. If the pole or fixture belongs to your co-op, call them before you touch it. Some co-ops offer LED replacements for rented lights.

What to Look for in an Outdoor Farm Light

• Built-in dusk-to-dawn photocell: Turns the light on and off by itself. If it switches on early or cycles at night, the photocell is in shade under an eave or catching its own light.
• Cold starting: LEDs come on at full brightness right away, unlike HID lamps that take minutes to warm up. Check the minimum starting temperature (RAB's YBLED is rated to -40°F).
• Wet-location listing: Look for UL or ETL wet-location listing, or IP65 or higher.
• Surge protection: Long rural power lines pick up lightning surges. Spec-grade fixtures list it; RAB's YBLEDH, for example, is rated to 6 kV.
• DLC listing if you want a utility rebate. Most rebate programs require a DLC-listed fixture.
• Glare and uplight: Barn-light style fixtures send some light sideways and up. Full-cutoff fixtures send it all down, which keeps it out of drivers' eyes, neighbors' windows and the night sky. Check the BUG rating: U0 means no uplight.
• Color temperature: 4000K is a good all-round choice, 5000K suits work areas, and 3000K cuts glare and sky glow (DarkSky recommends 3000K or warmer). Brightness comes from lumens, not color temperature. A selectable fixture lets you try each setting.

Agricultural Barn & Shed Lighting

Barn interiors combine dust, moisture, washdowns and, in livestock barns, corrosive gases. USDA NRCS's lighting practice standard calls for "noncorrosive, water-resistant light fixtures" in these spaces, installed to NEC Article 547 (Agricultural Buildings) (NRCS Code 670).

• Ceilings up to about 14 ft: Use sealed vapor-tight linear fixtures rated IP66 or NEMA 4X. They shrug off dust and hose-down cleaning.
• Taller pole barns and machine sheds: Use LED high bays, or high-output vapor-tights rated for washdown.
• Spacing: A common rule is about 1.5 times the mounting height between fixtures for even light (UW–Madison Dairyland Initiative).
• Controls: Put interior lights on timers or occupancy sensors where you can, and keep a manual override.

Cost-share: NRCS lists energy-efficient lighting as a conservation practice (Code 670). Replacement lamps or fixtures generally need to reach at least 90 lumens per watt. Ask your local NRCS office whether EQIP funding is available in your county.

LED Lights for Hog Barns

Hog barns are the hardest place on the farm for light fixtures: high-pressure washing, constant humidity and ammonia. Ontario's agriculture ministry (OMAFRA) recommends NEMA 4X or IP66 vapor-tight, wet-rated fixtures, CRI above 85, surge and voltage protection, and dimming-compatible drivers if you plan to dim. It also recommends a lighting layout from your supplier to check uniformity, shadows and glare.

Recommended light levels for swine facilities

Source: OMAFRA, Efficient Lighting for Swine Facilities. For reference, Canada's 2014 Code of Practice for pigs requires at least 50 lux for 8 hours a day plus at least 6 hours of darkness (under 5 lux). EU Directive 2008/120/EC requires at least 40 lux for 8 hours a day.

What matters when choosing hog barn fixtures

• Ammonia resistance: Polycarbonate is the most common lens and housing plastic, and it is chemically attacked by ammonia. Many barn fixtures use it successfully, but in high-ammonia rooms ask the maker for its chemical-compatibility data or an ammonia-resistance rating before you buy. Stainless latches and sealed cable entries help too.
• Dimming and timers: Breeding and gestation programs depend on a consistent photoperiod, so use a timer or controller instead of manual switches.
• Where you put the light: A 2024 Wageningen University review of 63 studies found pigs tend to rest in dimmer areas and use brighter areas for dunging. Lighting the dunging area more brightly than the lying area can help pen hygiene.

Honest buying advice: In confinement hog and poultry barns, the proven choice is agricultural-grade fixtures from specialists such as Signify's ONCE AgriShift line, HATO or Sunbird, sold through ag equipment dealers rather than Amazon. The Sunco vapor-tight above works well in machine sheds, dairy alleys and wash bays. Check it with the maker before installing it in a high-ammonia room.

Dairy Barn Lighting: Long-Day Programs

Long-day lighting is one of the best-documented ways to get more milk. Since the first report in 1978, studies have consistently shown that milking cows produce more milk on 16 hours of light and 8 hours of darkness, and the effect lasts through the whole lactation (Dahl et al., Journal of Dairy Science, 2000).

• Schedule: 16–18 hours of light, then 6–8 hours of uninterrupted darkness. OMAFRA reports milk yield increases of 8–10%. Lighting cows 24 hours a day gives no benefit.
• Intensity: 15–20 foot-candles (162–215 lux), even across the barn and measured about 3 ft above the stall surface. Design for 20 fc, because output drops as fixtures get dusty.
• Night checks: Use dim red lights (about 15W) every 20–30 ft. Cows don't perceive them as "light", so the dark period isn't broken.
• Dry cows respond to short days instead (about 6 hours of light and 18 of darkness), so give them their own lighting zone if you can.

Which LED products work best for long-day lighting? Ones that reliably hit 20 fc at cow height. Use IP66 or NEMA 4X fixtures sized and spaced from a lighting layout, all on a timer or controller, plus a separate circuit of dim red lights for the dark period. In low barns, linear vapor-tights spaced about 1.5 times the mounting height work well. In tall free-stall barns, use high bays.

Recommended light levels for dairy facilities

Sources: OMAFRA, Lighting for More Milk in Dairy Cows (2021) and Lighting Options for Free-Stall Housing. UW–Madison Dairyland Initiative, Lighting.

Farm Lighting FAQ

How bright should a farm yard light be?

For a typical farmstead yard pole at roughly 15–25 ft, 7,000–12,000 lumens (a 60–100W LED barn or area light) is the common choice. That matches the old 175W mercury vapor or 150–250W HPS/MH yard light. For bigger yards, add poles instead of buying one brighter light.

What color temperature is best for farm yard lights?

4000K is a good all-round choice, 5000K suits task areas like loading and repairs, and 3000K reduces glare and sky glow. Brightness comes from lumens, not Kelvin. Fixtures with a color switch let you try each setting.

Can I replace my old mercury vapor farm light with LED?

Yes. Mercury vapor ballasts for general lighting haven't been allowed to be made or imported in the U.S. since January 1, 2008, so replacing the whole fixture with a 50–65W LED dusk-to-dawn light is the practical fix. If your electric co-op owns the light, call them first.

Do LED lights work in an unheated barn in winter?

Yes. LEDs come on at full brightness right away in the cold, while HID lamps take several minutes to warm up. Check the fixture's minimum starting temperature; spec-grade fixtures such as RAB's YBLED are rated to -40°F.

What are the best LED lights for hog barns?

Sealed NEMA 4X or IP66 vapor-tight fixtures that can take pressure washing, with CRI above 85, surge protection and dimming-compatible drivers, all on a timer. Ask the maker about ammonia resistance, because common polycarbonate lenses can degrade in high-ammonia air. Agricultural-grade fixtures from ag dealers are the proven choice for confinement barns.

Which LED lighting is best for a dairy long-day program?

Fixtures that deliver an even 15–20 foot-candles (162–215 lux) about 3 ft above the stall surface, on a timer giving 16–18 hours of light and 6–8 hours of darkness, plus a separate circuit of dim red lights for night checks.