In short
- A horse barn lighting calculator turns floor area into lumens: area x foot-candle target / share of light that reaches the floor.
- Vendor guides give 10 to 20 foot-candles for stalls and 10 to 30 for aisles. We found no extension service or code that sets one number.
- We use 70 percent delivered light (our planning assumption) and never fewer than one fixture per stall.
- Planning range only. No prices.
On this page
- How the lumens and fixtures are worked out
- Stall lumens by stall size (per stall)
- Aisle lumens per 10 ft of aisle
- Example barn: fixtures by fixture size
- Notes for an Ocala barn
- What this calculator does not cover
- Questions to ask a builder or electrician
- Next step: get a written quote
- Sources
- Frequently asked questions
This horse barn lighting calculator is for Ocala and Marion County owners deciding how much light to ask a builder or electrician for: how many lumens the stalls, aisle and work rooms need, and about how many fixtures that means. It pairs with our barn electrical and lighting guide and the barn size calculator, which gives the floor plan to start from.
En español: calculadora de iluminación del establo
| Your numbers | Result |
|---|
Total fixtures by fixture size
| Fixture output | Fixtures |
|---|
Example: 8 stalls of 12 x 12 ft, an 80 ft x 12 ft aisle, 6,000 lumen fixtures.
How the lumens and fixtures are worked out
- Add up the floor areas.
8 stalls x 144 sq ft = 1,152 sq ft. Aisle 80 x 12 = 960 sq ft. Add any tack, feed or wash rooms.
- Pick the foot-candle range.
One foot-candle is one lumen per square foot. Stalls: 10 to 20. Aisle and rooms: 10 to 30.
- Allow for losses.
Divide by 0.7 (our planning assumption). Stalls: 1,152 x 10 / 0.7 = 16,457 to 1,152 x 20 / 0.7 = 32,914 lumens.
- Divide by one fixture and round up.
Stalls at 6,000 lumens: 3 to 6 by the lumen math, but one per stall makes it 8. Aisle: 960 x 10 / 0.7 = 13,714 to 41,143 lumens, so 3 to 7 fixtures.
- Add it up.
Total 30,171 to 74,057 lumens, or 11 to 15 fixtures of 6,000 lumens.
Stall lumens by stall size (per stall)
| Stall | Sq ft | Lumens |
|---|---|---|
| 10 x 10 ft | 100 | 1,429-2,857 |
| 10 x 12 ft | 120 | 1,714-3,429 |
| 12 x 12 ft | 144 | 2,057-4,114 |
| 12 x 14 ft | 168 | 2,400-4,800 |
At 10 to 20 foot-candles and 70 percent delivered light. Our arithmetic from vendor ranges.
Aisle lumens per 10 ft of aisle
| Aisle width | Lumens |
|---|---|
| 8 ft wide | 1,143-3,429 |
| 10 ft wide | 1,429-4,286 |
| 12 ft wide | 1,714-5,143 |
At 10 to 30 foot-candles and 70 percent delivered light, per 10 ft of aisle length.
Example barn: fixtures by fixture size
| Fixture output | Fixtures |
|---|---|
| 4,000 lm | 12 to 20 |
| 6,000 lm | 11 to 15 |
| 10,000 lm | 10 to 13 |
| 15,000 lm | 9 to 11 |
8 stalls of 12 x 12 ft and an 80 x 12 ft aisle. Never fewer than 8 stall fixtures.
Match lumens, not watts. Extension tips quote old incandescent watts (about 100 W per stall). An LED rated for the same light uses far fewer watts, so compare lumens on the spec sheet.
Notes for an Ocala barn
- Dust and moisture. Florida humidity and hay dust call for fixtures rated for it, guarded or recessed over stalls. See the electrical and lighting guide.
- Fixture layout. Counts say how much light, not where. Ask the electrician for spacing and mounting height from the fixture's photometric data.
- Wash rack and tack room. Wet areas need wet-rated fixtures. See wash rack and drainage and tack and feed room design.
- Power. More fixtures mean more circuits. See water and power in Marion County.
What this calculator does not cover
- Price. No prices here. See horse barn cost in Ocala.
- Arena or paddock lighting. Outdoor riding lights need their own plan and poles.
- Wiring and code. Circuits, switches and GFCI belong to your electrician and the county.
- Light for horse health. We only size light levels for work and safety.
Questions to ask a builder or electrician
- How many fixtures and how many lumens each? Bring the range from this page.
- Are all fixtures dust- and moisture-rated? And how are stall lights guarded or recessed?
- Can I see the photometric layout? It shows real foot-candles on the floor.
- How are the aisle lights switched? Master switch near the doors, plus a night light.
- Can you put it on paper? Use the quote comparison worksheet.
Next step: get a written quote
This tool estimates a light level and a fixture count, not the price or the job. We are a referral service, not a builder or electrician; we connect visitors with independent local providers. Use the form below to ask independent local builders for a written quote, and read how to choose a horse barn builder first. To compare bids side by side, use the bid comparison calculator.
Sources
- LED Horse Barn and Stable Lighting, LED Lighting Supply: 10 to 20 fc stalls, 10 to 30 fc aisles (vendor guide).
- Equine Lighting, ProLighting: 20 to 30 fc in stall areas (vendor guide).
- Seeing the Light, Stable Management: lighting levels and layout.
- University of Kentucky Extension: one light per stall, as summarized in our electrical and lighting guide.
- The 70 percent delivered-light factor and the use of aisle levels for rooms are our planning assumptions. Foot-candle ranges are vendor guidance, not a building code.
Frequently asked questions
How many lumens does a horse barn need?
Start with foot-candles, which are lumens per square foot reaching the floor. Lighting vendor guides commonly give about 10 to 20 foot-candles for stalls and 10 to 30 for aisles. Multiply by the floor area, then divide by the share of light that actually reaches the floor. We use 70 percent as our planning assumption, since walls, dust and aging fixtures cut the light. An 80 ft x 12 ft aisle at 10 to 30 foot-candles is about 13,700 to 41,100 lumens.
How many lights per horse stall?
University of Kentucky Extension suggests at least one light near the center of each stall when the ceiling is 9 feet or higher (a 100-watt incandescent in its example). This calculator never goes below one fixture per stall, even if the lumen math says fewer would do. A modern LED fixture listing that same wattage gives off a different amount of light, so match the lumens, not the watts.
Do I need more light in the aisle or the stalls?
Usually the aisle and any grooming or clipping spot, because that is where people work on legs and feet. Vendor guides give the aisle a wider range (10 to 30 foot-candles) than stalls (10 to 20). Some suggest two rows of fixtures along the sides of the aisle instead of one down the center, which tends to light only the horse's back.
Is this a lighting design?
No. It is a planning estimate to bring to a builder or electrician. Fixture spacing, mounting height, beam shape and dust-rated housings change what really reaches the floor, so ask for the fixture maker's photometric data. Foot-candle targets here come from vendor guides, not a building code.
Are LED or other fixtures better?
This calculator only counts lumens, so it works for any fixture type. Whatever you choose, extension sources want barn fixtures that are rated for dust and moisture and guarded or recessed so horses cannot reach them. See our barn electrical and lighting guide.