LFL Lighting - Full Process LED Lighting Solutions Provider Since 2013.
For a properly designed LED street light with a quality driver installed in a typical outdoor environment, you should see a field failure rate under 1% after three years. If it's significantly above that, something is wrong — probably one of:
- Driver failures: The most common cause. Look for capacitor swelling on failed units — it indicates either a surge event exceeded the driver's protection rating, or the driver is running hotter than designed.
- Water ingress: Failed gaskets or breather valves. If multiple fixtures in the same area fail, look at the prevailing wind direction — wind-driven rain hits from a consistent angle and will find any sealing weakness.
- Surge damage: If failures cluster by electrical phase or after thunderstorms, your surge protection is undersized for the location. Upgrade to 10 kV or add external SPDs at the pole base.
A 0.5–1% annual failure rate is normal and expected — that's why municipalities order spares. A 5%+ failure rate inside three years means a design or component problem. If you're seeing that, collect the failed units, photograph the internals, and request a root cause analysis from the supplier. A good supplier will want to know as much as you do — field failures are expensive for both sides, and finding the root cause prevents the same failure in future production batches.
The warranty period doesn't directly tell you the driver's expected lifespan — it tells you how long the supplier is contractually obligated to replace it if it fails. A well-designed driver with quality components can last 50,000+ hours (that's over 11 years at 12 hours/day). A driver from the same brand but built to a lower cost target might fail at 20,000 hours. Both could carry a 5-year warranty if the supplier is pricing in expected replacements.
What actually matters: the Tc rating (case temperature at which the lifetime is specified), the capacitor brand and temperature rating (Japanese capacitors at 105°C vs. Chinese capacitors at 85°C — this is the single biggest factor in driver longevity), and the surge protection rating. A driver with a 5-year warranty but 2 kV surge protection will fail faster in the real world than one with a 3-year warranty and 6 kV surge protection if your grid has voltage spikes.
This is why we specify driver model numbers, not just brand names, and provide Tc ratings in our quotations. See our LED lifetime article for why L70 and warranty are measuring different things.
HS code 9405.11 (fixed ceiling/wall luminaires, LED), EU duty rate 3.7% on the CIF value. Add 19% German import VAT (Einfuhrumsatzsteuer) on top of CIF + duty. If you're VAT-registered in Germany, the import VAT is recoverable — it's a cash-flow impact, not a final cost. LED high bays, street lights, and floodlights typically fall under 9405.40 at 2.7% duty. LED strip lights are usually 9405.41 at 3.7%. Confirm the exact HS code with your customs broker before the shipment sails — reclassifying at the border is expensive. And don't forget the ErP energy label registration in EPREL — without it, customs may hold the container regardless of what duty you've paid. We cover the full compliance picture in our EU certifications guide.