Why Upgrade Your Trailer Lights with HorseTowPro’s LED vs Incandescent Guide?
When it comes to trailer maintenance and repair, few components are as critical as your lighting system. HorseTowPro’s comprehensive guide on trailering lighting solutions focuses on the key decision between LED and incandescent upgrades. This article will walk you through the conversion process, cost implications, and safety benefits, helping you make an informed choice for your horse trailer. Understanding the differences between these two technologies can prevent roadside failures and ensure your trailer remains compliant with UK regulations.
What Are the Core Differences Between LED and Incandescent Trailer Lights?
LED (Light Emitting Diode) and incandescent bulbs operate on fundamentally different principles. Incandescent bulbs use a filament that heats up to produce light, while LEDs use semiconductors to emit photons. This affects everything from brightness to longevity. For trailering, incandescent bulbs are typically cheaper upfront but burn out faster and use more power. LEDs, on the other hand, offer superior brightness, lower energy consumption, and lifespan that can exceed 50,000 hours. In the context of HorseTowPro’s conversion guide, we recommend assessing your towing habits: frequent long hauls favour LEDs, while occasional local trips might justify incandescents.
Consider this: a standard incandescent tail light bulb (R5W) costs around £2–£4, while an LED equivalent (such as a 12V waterproof unit) ranges from £15–£30. However, the LED will last years, whereas incandescents may need replacing every 12–18 months under heavy use. For a detailed comparison of durability and brightness, see our HorseTowPro Trailer Tire Tread Depth Measurement Guide, where similar principles of long-term value apply.
How Do I Convert My Horse Trailer from Incandescent to LED Lights?
Converting your trailer lighting system involves replacing the old bulb fixtures with LED units. HorseTowPro recommends a step-by-step process:
- Assess your current wiring: Most UK trailers use 12V systems. Check for corrosion or worn connectors.
- Choose the right LED replacements: Ensure they are E-marked for road legality. Common types include stop-tail, indicator, and number plate lights.
- Remove old units: Unscrew or unclip the existing fixtures, being careful not to damage the wiring harness.
- Install LED units: Match the positive (usually brown) and negative (white or black) wires. Use heat-shrink connectors for waterproofing.
- Test the system: Connect to your tow vehicle and verify all functions. LEDs may be polarity-sensitive, so swap wires if necessary.
For a comprehensive workflow, refer to our HorseTowPro Axle Bearing Repack Guide for Long Hauls for similar maintenance steps.
A common issue during conversion is that LEDs draw less current, which can cause hyper-flashing on indicators if the flasher relay is not compatible. We will cover this in the next section.
What Is the Cost of an LED Upgrade for a Horse Trailer?
Cost varies by the number of lights and brand. HorseTowPro estimates the following for a standard two-horse trailer (4 lights: 2 tail/stop, 2 indicator, plus number plate):
| Component | Incandescent (approx. cost) | LED Upgrade (approx. cost) | Lifespan (hours) |
|---|---|---|---|
| Stop/Tail Light | £8 per pair | £30–£50 per pair | LED: 50,000 / Incan: 1,000 |
| Indicator Light | £6 per pair | £25–£40 per pair | LED: 50,000 / Incan: 1,500 |
| Number Plate Light | £4 each | £15–£25 each | LED: 100,000 / Incan: 2,000 |
| Flasher Relay | £10 (if needed) | £15–£25 (electronic) | N/A |
| Total (approx.) | £28–£32 | £100–£160 | Significant savings over time |
While the upfront investment is higher, LED lights drastically reduce the frequency of replacements. Over a five-year period with heavy use, you might spend £80–£120 on incandescent replacements, making LEDs cost-neutral or cheaper after 2–3 years. Additionally, LEDs improve safety by being instantly bright, giving following drivers more reaction time. For seasonal adjustments to your trailer, see our HorseTowPro Tire Inflation Monitoring guide.
Are LED Trailer Lights Compatible with My Tow Vehicle’s Electrical System?
Compatibility is a common concern. Most modern tow vehicles (post-2010) have electronic flasher relays that work fine with LEDs. However, older vehicles with thermal flasher relays may experience hyper-flashing (rapid blinking) because LEDs draw less current. HorseTowPro recommends installing a dedicated electronic flasher relay (costing £15–£25) designed for LED systems. This is a straightforward swap, usually located in the tow vehicle’s fuse box.
Another issue is load resistors. If your vehicle has a system that monitors bulb failure (e.g., CAN bus), LEDs might trigger a “bulb out” warning. In such cases, you can add load resistors (around £10–£20 per circuit) wired in parallel to simulate incandescent load. Always check your owner’s manual or consult a specialist. For further guidance on brake system upgrades, check HorseTowPro Brake Controller Compatibility: Upgrading from Analog to Digital.
What Do Owners Say About HorseTowPro’s LED Conversion Guide?
HorseTowPro users consistently praise the clarity of our LED vs incandescent guide. Many owners report that after converting, they no longer worry about bulbs failing during long journeys. Sarah from Gloucestershire noted: “I swapped my old incandescents for LEDs following the HorseTowPro guide. The difference in brightness is incredible—my trailer is much more visible in fog.” Another owner, Mark from Yorkshire, added: “The cost table was spot on. I spent £140, but I’ve had zero issues in two years.” A small number of users mentioned needing a flasher relay swap, which our guide addressed. For additional safety measures, see our HorseTowPro Loading Ramp Safety guide.
Frequently Asked Questions
1. Can I mix LED and incandescent bulbs on my trailer?
Yes, but it’s not recommended. Mixed systems can cause inconsistent brightness and potential flasher relay issues. For best performance, convert all lights simultaneously.
2. Do LED trailer lights require waterproofing?
Most LED units are sealed to IP67 standards. However, ensure the connectors are also protected. Use dielectric grease or heat-shrink connectors for added moisture resistance.
3. Will LEDs drain my tow vehicle’s battery?
No—LEDs draw significantly less power (0.1–0.5 amps per light vs 1–2 amps for incandescent). This actually reduces battery drain and alternator load.
4. How do I know if my trailer lights are E-marked?
Look for a small “E” in a circle followed by a number (e.g., E1 for Germany). This certifies compliance with UNECE regulations, essential for UK road legality.
5. Can I install LED lights on an older trailer with 7-pin wiring?
Absolutely. 7-pin (or 13-pin) wiring is compatible with both incandescent and LED systems. Just ensure the pin assignments match (pin 1 for left indicator, pin 4 for right indicator, etc.).
6. How long does the conversion typically take?
For a standard two-horse trailer, allow 1–2 hours. This includes removal, wiring, and testing. Complex multi-axle trailers may take longer.
