A piglet infrared heat lamp is a red or clear reflector-style bulb, hung in a guarded fixture over the creep area, that gives newborn piglets a warm resting spot while the sow stays in a cooler room. Used well, it is one of the simplest ways to protect piglets in their first days. Used badly, it is also one of the more common causes of barn fires.
Key takeaways
- Piglets and sows need different temperatures. A commonly quoted piglet microclimate is 32–35 °C, while sows prefer about 19 °C. A lamp warms the piglet directly, so the rest of the pen can stay cool.
- The first two days matter most. Older studies report that about half of pre-weaning deaths happen in that window, so the lamp must work and the creep must be attractive from the first hours.
- Use the lowest wattage that holds the target at piglet level. Common fixtures are rated to 175 W or 250 W maximum, and extension guidance advises against bulbs above 250 W in barns.
- Hard-glass constructions suit wet, cold-wash pens, but no bulb should be assumed shatterproof unless its datasheet says so.
- Fire control is mostly about the setup: chain mount, guard, direct outlet, clean fixture, extinguisher and a daily check.
Why piglets need a heat lamp at all
Newborn piglets have a high surface-area-to-weight ratio and little ability to regulate their own body temperature. Zhongrun’s livestock heating bulb guide, summarizing a published research review, reports microclimate recommendations of 32–35 °C for piglets against roughly 19 °C preferred by sows. That mismatch is why a localized heat source beats warming the whole room.
The UK’s AHDB gives a classic example. In a farrowing pen without a boxed creep, the air may sit at the sow’s lower critical temperature (typically 16 °C), yet the radiant output of a pig lamp lets the piglet underneath stay above its own much higher threshold. AHDB also notes that piglets need creep heating from birth to about three weeks of age.
Timing is critical. A 1972 study cites earlier work indicating that about 50% of pre-weaning mortality occurs in the first two days after farrowing, and that the more time piglets spend in a heated creep, the less likely they are to be chilled or overlain. The data are dated, so treat them as indicative, but they fit current advice: AHDB says piglets learn to use a creep within the first 40–48 hours and suggests holding them in it for about an hour after suckling.
A caution about the 32–35 °C figure
That number is a dry-bulb air temperature at piglet level, and it is often misread as the surface temperature wanted under a lamp. Published targets also vary: a Brazilian creep-heating study describes an age-dependent optimum that starts at 30–32 °C at birth. Treat the figures as a starting point, confirm the target for your genetics and housing with your veterinarian or breeding-stock supplier, and let piglet behavior decide the final setting.
Figure 1. Original diagram: a lamp over the creep makes a warm zone with cooler edges, and the sow’s side stays cooler. Temperatures are indicative and drawn from the sources cited in Table 1.
The numbers at a glance
| Parameter | Published guidance |
|---|---|
| Piglet microclimate at birth | 32–35 °C is commonly quoted (air temperature at piglet level); one creep-heating study reports 30–32 °C at birth, falling with age |
| Sow comfort | About 19 °C preferred; lower critical temperature typically 16 °C |
| How long piglets need creep heat | From birth to about three weeks |
| Highest-risk window | Older studies cite about half of pre-weaning deaths in the first two days |
| Creep training | Piglets learn to use a creep within 40–48 hours of birth |
| Resting area for a litter of 10 | 0.58 m² (week 1), 0.76 m² (week 2), 0.91 m² (week 3) at comfortable temperatures |
| Bulb wattage ceiling in barns | Avoid bulbs above 250 W; never exceed the fixture’s own rating (examples: 175 W and 250 W) |
| Clearance to bedding and newborns | At least 20 in (about 50 cm) as a starting point |
| Zhongrun R40/R125 published range | 120 or 240 V; 125–275 W; E26/E27 base; 165 or 182 mm; about 5,000 h rated life |
Table 1. Piglet heat lamp reference values. Figures come from different studies and housing systems, so use them to frame your own measurements, not to replace them.
The bulb is only half of the heat lamp
Most buyers search for a “piglet heat lamp” but are really choosing two things: a bulb and a fixture. The fixture sets the safe wattage ceiling, the clearance to piglets and how the lamp is hung. Two published examples show what to look for. Kerbl’s large infrared heater uses a 35 cm aluminium screen with ventilation slits, a safety grille under the lamp, a fastening chain, a 5 m cable and an IPX4 rating, and takes a bulb of up to 250 W that is sold separately. Its smaller 21 cm model is limited to 175 W. These are examples of fixture features, not an endorsement of one brand.
Zhongrun’s product pages list lamps (bulbs), so the practical rule is simple: the bulb’s base (E26 or E27), length (165 mm or 182 mm), voltage and wattage must all sit within what your fixture is rated for. A 120 V lamp on a 240 V supply will fail almost immediately, so check the voltage marking before switching on.
Choosing the bulb
Wattage
Zhongrun’s R40/R125 infrared heat lamps are published in 125, 150, 175, 200, 250 and 275 W at 120 V or 240 V, with an E26/E27 base and a rated life of about 5,000 hours. The BR40/BR125 and PAR38 category pages list the same ranges. For piglets the useful question is not “how much heat do I want?” but “what is the lowest wattage that holds the target at piglet level without exceeding the fixture rating?” Extension guidance, as summarized in Zhongrun’s animal heating lamp guide, advises avoiding bulbs above 250 W in livestock barns and keeping lamps at least 20 inches (about 50 cm) from bedding and newborns. Start low, measure, and step up only if the creep stays cold.
Glass and coating
Glass decides what happens when a cold splash, a knock or a wash-down meets a hot bulb. Zhongrun lists hard-glass versions, a Teflon-coated safety bulb and a PAR38 hard-glass “anti explosion” model (see Table 2). Its own livestock infrared heating bulb page is deliberately cautious: it says buyers should not assume a bulb is waterproof, shatterproof, suitable for direct animal contact or compatible with every socket unless the model’s specification says so. That is the right attitude. Ask for the datasheet and any test evidence for the exact model.
Red or clear; R, BR or PAR
Red tint mainly reduces visible glare; it does not make a lamp a stronger heater, so compare lamps by wattage and construction rather than color. Bulb shape changes how heat is directed. R-type lamps are the broad default, BR-type bodies carry a built-in reflector, and PAR-type lamps typically give a more directional beam that suits a small creep corner. One detail to check: Zhongrun’s PAR38 category page describes a white light output, while its hard-glass anti-explosion model lists red. Confirm the color on the model page before ordering.
| Lamp | What the manufacturer publishes | Where it may fit in a pig house | Confirm before ordering |
|---|---|---|---|
| R40/R125 Hard Glass IR Lamp | Hard glass, red; 120/240 V; 125–275 W; E27/E26; 165/182 mm; 5,000 h | Humid, cool or draughty pens where a splash or draught could reach a hot bulb | Wattage against the fixture rating; glass rating on the datasheet |
| R40 IR Lamp TEFLON | Red, Teflon-coated safety bulb, described as suited to settings where breakage is a concern | Pens where keeping glass fragments together matters | Coating specification and test evidence; follow the model’s published rating |
| BR40/BR125 Hard Glass IR Lamp | Hard glass, red; same electrical range; page describes shatter-resistant glass | Focused heat over a defined creep area (reflector-type body) | Fixture fit and bulb length |
| PAR38 Hard Glass IR Lamp Anti Explosion | Hard glass, “anti explosion”, red listed; same electrical range | Directional spot heat in a tight creep corner | Light color (the category page mentions white light) and beam spread |
Table 2. Zhongrun lamp families to consider for piglet pens, based on each model’s published page. Individual models differ, so always confirm against the model-specific sheet.
Layout and installation
Size the creep for week three, not day one
In a controlled study of litters of 10 piglets in a 1 × 2 m creep box, the area occupied at comfortable temperatures was about 0.58 m² at one week (3.7 kg per piglet), 0.76 m² at two weeks (6.1 kg) and 0.91 m² at three weeks (8.6 kg). A rule of thumb cited by Zhongrun is roughly 0.5 ft² per piglet, which is in the same range at birth. The research shows the footprint grows by more than half by week three, so choose a lamp, reflector and creep layout that can cover the larger area, or that can be moved as piglets grow.
A step-by-step routine
- Match bulb to fixture. Check voltage, wattage ceiling, base type and bulb length on both, and compare the voltage marking with your measured supply.
- Plan the zones first. Put the warm zone over the creep, leave a cooler area beyond it, and keep the heat off the sow, who prefers about 19 °C.
- Mount it securely. Use a non-flammable chain or purpose-made hanger on a solid structure, not twine, and preferably not on the pen itself. Keep the cable out of reach of sow and piglets.
- Fit a guard and keep clearance. Use a safety grille under the bulb and, as a starting point, at least 50 cm to bedding and piglets.
- Plug in directly. Use an outlet, not an extension cord.
- Measure, then watch. Read the temperature at piglet level under the beam and at the edge of the warm zone, then watch behavior for an hour before changing anything.
- Step down as piglets grow. Raise the lamp in small steps and stop supplemental heat when piglets no longer need it, which AHDB places at about three weeks.
Reading the piglets
A thermometer reports one point. Piglets show whether the whole zone works. In a controlled resting-behavior study, huddling and sternal lying were more common in cool conditions, and piglets occupied about 10% less area when conditions were 4 °C too cool and about 10% more when 4 °C too warm. Zhongrun’s guide makes the same point: animal behavior is the most reliable sensor.
| What you see | Likely meaning | What to do |
|---|---|---|
| Piglets pile together, shivering or upright on their chests | Too cool, a draught, or a lamp hung too high | Check the bulb is working, block draughts or add a creep cover, lower the lamp slightly, then re-measure at piglet level |
| Piglets lie relaxed on their sides, spread across the warm zone | Temperature is about right | Keep monitoring at each check |
| Piglets lie at the edge or away from the lamp, breathing fast | Too warm, or no cooler area to move to | Raise the lamp or use a lower wattage, and make sure a clearly cooler area exists |
| Piglets ignore the creep and lie against the sow | Warm zone is weak, too small or draughty, or piglets were not trained to use it | Check temperature and footprint, and train piglets to the creep within the first 40–48 hours |
| Bulb fails within hours or flickers | Voltage mismatch, a damaged socket, or moisture | Compare the lamp marking with the measured supply, replace worn sockets, and keep spare bulbs on hand for the critical first days |
Table 3. Behavior-based troubleshooting for a piglet creep lamp.
Fire and electrical safety
Lamps are inexpensive and effective, which is exactly why the fire record deserves attention. Zhongrun’s guide cites a US National Fire Protection Association study of barn fires from 2002 to 2005: an estimated 1,090 barn structure fires a year, almost a quarter caused by heating equipment, with heat lamps the leading item in that category. NDSU Extension adds that lamps raise risk most over deep, bedded straw, that a bumped lamp or chewed cord can start a fire within minutes, and that lamps should be checked every day, several times a day.
- Fixture and bulb: use a quality lamp designed to withstand a fall and bulbs that will not break if they drop into the pen, and avoid cheap hardware-store lamps.
- Mounting: chain, not twine, fixed to something solid and out of every animal’s reach.
- Electrical: plug directly into an outlet rather than an extension cord. NDSU also explains why arc faults matter: a lamp that sparks when knocked into the pen can start a fire.
- Housekeeping: clear dust, cobwebs and dead insects before use, and inspect for exposed wiring, loose sockets and broken bulbs stuck in the socket.
- Building: use an isolated building where possible, fit a smoke detector, and keep an extinguisher at each entrance.
- Bedding: keep flammable material such as straw to a minimum where lamps are used.
- Wash-down: switch off at the supply and let the bulb cool before washing, and use sockets and plugs rated for wet areas (the example fixture above is IPX4-rated).
This list summarizes the cited sources. It does not replace local fire codes or advice from your electrician or fire department.
Are lamps always the best option?
No. Zhongrun’s guide, summarizing National Hog Farmer, notes studies that found no difference in piglet productivity between lamps and heat mats, and that a semi-enclosed, radiantly heated microclimate used about 50% less energy than a traditional lamp. Enclosures and creep covers hold heat and cut draughts but make inspection and cleaning harder. Lamps remain a defensible choice where power infrastructure or budget is limited, provided the guard, mount and wiring are right.
Running cost
Energy, not the bulb, is the main cost. A 250 W lamp running continuously uses 0.25 kW × 24 h = 6 kWh a day, or 84 kWh over 14 days. A 175 W lamp uses 4.2 kWh a day, or 58.8 kWh over 14 days, which is 30% less. Multiply by your local tariff. The rated life of about 5,000 hours equals roughly 208 days of continuous use, but real bulb life depends more on switching, voltage fluctuations, moisture and wash-downs than on the rating.
Questions to ask a manufacturer before you order
- Exact model and datasheet: voltage, wattage, base, length and diameter, glass type and coating.
- Which certificate covers it: Zhongrun’s About page displays CE-LVD, CE-EMC and ISO 9001:2015 certificates. Ask which one applies to your model and market, and request a copy.
- Supply voltage: confirm the lamp is built for your mains voltage.
- A pilot order: test samples in one pen before buying in bulk.
- Custom specifications: Zhongrun says its R&D team can develop products from drawings or samples.
- Commercial terms: lead time, minimum order and warranty are not published on the site, so ask.
Haining Zhongrun Lighting & Electronics Co., Ltd. is a Zhejiang-based manufacturer of specialty light sources, focused on infrared and UV lamps. Its About page reports a factory on more than 20,000 m² of land with more than 25,000 m² of floor area, more than 150 employees, an in-house testing lab and a site about 100 km from Shanghai Port; the company also reports more than 25 years of experience and customers in more than 60 countries and regions. These are company-reported figures, so verify any that matter to your purchase.
For specifications or a quotation, use the contact page, email sales@zhongrun-light.com, or call 0086-573-87266658. Product pages state that inquiries receive a reply within 12 hours on working days. Include your voltage, target wattage, base type and pen layout.
Frequently asked questions
What wattage is best for a piglet lamp?
There is no universal answer. Many fixtures are rated to 175 W or 250 W maximum, and extension guidance advises against bulbs above 250 W in barns. Pick the lowest wattage that holds the target at piglet level and never exceed the fixture rating.
How high should I hang it?
Start with at least 20 inches (about 50 cm) of clearance to bedding and piglets, then adjust in small steps using a thermometer at piglet level and the behavior in Table 3.
Is a red bulb better than a clear one?
Heat output depends on wattage and construction, not color. Red mainly reduces glare.
Can I leave the lamp on all the time?
Piglets need supplemental heat from birth to about three weeks, so lamps usually run continuously in the early days. The safeguard is the setup and the inspections described above, and stepping the heat down as piglets grow.
Is a hard-glass or anti-explosion bulb unbreakable?
No. Hard glass handles thermal shock better, but the manufacturer’s own livestock bulb page says not to assume a bulb is shatterproof unless the specification states it. Keep the guard and the mounting discipline regardless.
Can the same bulb warm chicks or lambs?
Often yes, but targets differ by species. See Zhongrun’s brooder heat lamp guide for chicks, the Animal Breeding and Animal Care application pages, and the general infrared lamp selection guide. More articles are on the Zhongrun blog.
